221111002111212 has 72 divisors (see below), whose sum is σ = 589286755803200. Its totient is φ = 69711724705248.

The previous prime is 221111002111189. The next prime is 221111002111253. The reversal of 221111002111212 is 212111200111122.

It is a happy number.

221111002111212 is a `hidden beast` number, since 221 + 1 + 110 + 0 + 211 + 121 + 2 = 666.

It is a super-2 number, since 2×221111002111212² (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 23 ways as a sum of consecutive naturals, for example, 260692678 + ... + 261539469.

Almost surely, 2^{221111002111212} is an apocalyptic number.

It is an amenable number.

221111002111212 is an abundant number, since it is smaller than the sum of its proper divisors (368175753691988).

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

221111002111212 is a wasteful number, since it uses less digits than its factorization.

221111002111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522232795 (or 522232790 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 221111002111212 its reverse (212111200111122), we get a palindrome (433222202222334).

The spelling of 221111002111212 in words is "two hundred twenty-one trillion, one hundred eleven billion, two million, one hundred eleven thousand, two hundred twelve".