212200111111221 has 96 divisors (see below), whose sum is σ = 314700259760640. Its totient is φ = 137755843776000.

The previous prime is 212200111111211. The next prime is 212200111111337. The reversal of 212200111111221 is 122111111002212.

It is a happy number.

212200111111221 is a `hidden beast` number, since 2 + 1 + 220 + 0 + 111 + 111 + 221 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-212200111111221 is a prime.

It is a super-2 number, since 2×212200111111221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212200111111194 and 212200111111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212200111111211) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8065672015 + ... + 8065698323.

It is an arithmetic number, because the mean of its divisors is an integer number (3278127705840).

Almost surely, 2^{212200111111221} is an apocalyptic number.

It is an amenable number.

212200111111221 is a deficient number, since it is larger than the sum of its proper divisors (102500148649419).

212200111111221 is a wasteful number, since it uses less digits than its factorization.

212200111111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27107 (or 27104 counting only the distinct ones).

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

Adding to 212200111111221 its reverse (122111111002212), we get a palindrome (334311222113433).

The spelling of 212200111111221 in words is "two hundred twelve trillion, two hundred billion, one hundred eleven million, one hundred eleven thousand, two hundred twenty-one".