210121210222 has 64 divisors (see below), whose sum is σ = 402769635840. Its totient is φ = 79844688000.

The previous prime is 210121210151. The next prime is 210121210223. The reversal of 210121210222 is 222012121012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 210121210196 and 210121210205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210121210223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 941304 + ... + 1142932.

It is an arithmetic number, because the mean of its divisors is an integer number (6293275560).

Almost surely, 2^210121210222 is an apocalyptic number.

210121210222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

210121210222 is a deficient number, since it is larger than the sum of its proper divisors (192648425618).

210121210222 is a wasteful number, since it uses less digits than its factorization.

210121210222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201817.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 210121210222 its reverse (222012121012), we get a palindrome (432133331234).

The spelling of 210121210222 in words is "two hundred ten billion, one hundred twenty-one million, two hundred ten thousand, two hundred twenty-two".