210121001212122 has 192 divisors, whose sum is σ = 627781666546944. Its totient is φ = 49017076024320.

The previous prime is 210121001212117. The next prime is 210121001212183. The reversal of 210121001212122 is 221212100121012.

210121001212122 is a `hidden beast` number, since 210 + 1 + 210 + 0 + 121 + 2 + 122 = 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 = 210121001212095 and 210121001212104.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 156924243 + ... + 158257574.

It is an arithmetic number, because the mean of its divisors is an integer number (3269696179932).

Almost surely, 2^{210121001212122} is an apocalyptic number.

210121001212122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

210121001212122 is an abundant number, since it is smaller than the sum of its proper divisors (417660665334822).

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

210121001212122 is a wasteful number, since it uses less digits than its factorization.

210121001212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315181893 (or 315181890 counting only the distinct ones).

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

Adding to 210121001212122 its reverse (221212100121012), we get a palindrome (431333101333134).

The spelling of 210121001212122 in words is "two hundred ten trillion, one hundred twenty-one billion, one million, two hundred twelve thousand, one hundred twenty-two".