210122022121100 has 144 divisors (see below), whose sum is σ = 484081708350240. Its totient is φ = 78892545331200.

The previous prime is 210122022121091. The next prime is 210122022121103. The reversal of 210122022121100 is 1121220221012.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (210122022121103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11259945770 + ... + 11259964430.

It is an arithmetic number, because the mean of its divisors is an integer number (3361678530210).

Almost surely, 2^{210122022121100} is an apocalyptic number.

210122022121100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210122022121100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242040854175120).

210122022121100 is an abundant number, since it is smaller than the sum of its proper divisors (273959686229140).

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

210122022121100 is a wasteful number, since it uses less digits than its factorization.

210122022121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36108 (or 36101 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 210122022121100 its reverse (1121220221012), we get a palindrome (211243242342112).

The spelling of 210122022121100 in words is "two hundred ten trillion, one hundred twenty-two billion, twenty-two million, one hundred twenty-one thousand, one hundred".