221210112211002 has 40 divisors (see below), whose sum is σ = 500582179154772. Its totient is φ = 73006637688000.

The previous prime is 221210112210943. The next prime is 221210112211019. The reversal of 221210112211002 is 200112211012122.

221210112211002 is a `hidden beast` number, since 221 + 210 + 1 + 1 + 221 + 10 + 0 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 165852182046321 + 55357930164681 = 12878361^2 + 7440291^2 .

It is a super-2 number, since 2×221210112211002² (a number of 29 digits) contains 22 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 polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6759857499 + ... + 6759890222.

Almost surely, 2^{221210112211002} is an apocalyptic number.

221210112211002 is an abundant number, since it is smaller than the sum of its proper divisors (279372066943770).

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

221210112211002 is a wasteful number, since it uses less digits than its factorization.

221210112211002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13519747836 (or 13519747827 counting only the distinct ones).

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

Adding to 221210112211002 its reverse (200112211012122), we get a palindrome (421322323223124).

The spelling of 221210112211002 in words is "two hundred twenty-one trillion, two hundred ten billion, one hundred twelve million, two hundred eleven thousand, two".