210121021112202 has 24 divisors (see below), whose sum is σ = 467566596530436. Its totient is φ = 68147358198336.

The previous prime is 210121021112131. The next prime is 210121021112209. The reversal of 210121021112202 is 202211120121012.

210121021112202 is a `hidden beast` number, since 21 + 0 + 1 + 210 + 211 + 1 + 220 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 209912024932281 + 208996179921 = 14488341^2 + 457161^2 .

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

It is not an unprimeable number, because it can be changed into a prime (210121021112209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157748513683 + ... + 157748515014.

Almost surely, 2^{210121021112202} is an apocalyptic number.

210121021112202 is an abundant number, since it is smaller than the sum of its proper divisors (257445575418234).

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

210121021112202 is a wasteful number, since it uses less digits than its factorization.

210121021112202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315497028742 (or 315497028739 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 210121021112202 its reverse (202211120121012), we get a palindrome (412332141233214).

The spelling of 210121021112202 in words is "two hundred ten trillion, one hundred twenty-one billion, twenty-one million, one hundred twelve thousand, two hundred two".