210121001202222 has 128 divisors (see below), whose sum is σ = 510996386534400. Its totient is φ = 63471587558400.

The previous prime is 210121001202221. The next prime is 210121001202269. The reversal of 210121001202222 is 222202100121012.

It is a happy number.

210121001202222 is a `hidden beast` number, since 210 + 1 + 210 + 0 + 1 + 20 + 2 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 210121001202195 and 210121001202204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210121001202221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1042626447 + ... + 1042827957.

It is an arithmetic number, because the mean of its divisors is an integer number (3992159269800).

Almost surely, 2^{210121001202222} is an apocalyptic number.

210121001202222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 210121001202222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255498193267200).

210121001202222 is an abundant number, since it is smaller than the sum of its proper divisors (300875385332178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210121001202222 is a wasteful number, since it uses less digits than its factorization.

210121001202222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207079 (or 207073 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 210121001202222 its reverse (222202100121012), we get a palindrome (432323101323234).

The spelling of 210121001202222 in words is "two hundred ten trillion, one hundred twenty-one billion, one million, two hundred two thousand, two hundred twenty-two".