221210112121002 has 96 divisors (see below), whose sum is σ = 492597522144000. Its totient is φ = 71692062733440.

The previous prime is 221210112120973. The next prime is 221210112121043. The reversal of 221210112121002 is 200121211012122.

221210112121002 is a `hidden beast` number, since 221 + 210 + 1 + 1 + 21 + 210 + 0 + 2 = 666.

It is a super-3 number, since 3×221210112121002³ (a number of 44 digits) contains 333 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15801843999 + ... + 15801857997.

It is an arithmetic number, because the mean of its divisors is an integer number (5131224189000).

Almost surely, 2^{221210112121002} is an apocalyptic number.

221210112121002 is an abundant number, since it is smaller than the sum of its proper divisors (271387410022998).

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

221210112121002 is a wasteful number, since it uses less digits than its factorization.

221210112121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29468 (or 29465 counting only the distinct ones).

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

Adding to 221210112121002 its reverse (200121211012122), we get a palindrome (421331323133124).

The spelling of 221210112121002 in words is "two hundred twenty-one trillion, two hundred ten billion, one hundred twelve million, one hundred twenty-one thousand, two".