212221111210101 has 48 divisors (see below), whose sum is σ = 358880899104000. Its totient is φ = 118310457450240.

The previous prime is 212221111210079. The next prime is 212221111210111. The reversal of 212221111210101 is 101012111122212.

It is a happy number.

212221111210101 is a `hidden beast` number, since 21 + 2 + 221 + 111 + 210 + 101 = 666.

It is not a de Polignac number, because 212221111210101 - 2²⁶ = 212221044101237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221111210111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 418329400 + ... + 418836398.

It is an arithmetic number, because the mean of its divisors is an integer number (7476685398000).

Almost surely, 2^{212221111210101} is an apocalyptic number.

212221111210101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212221111210101 is a deficient number, since it is larger than the sum of its proper divisors (146659787893899).

212221111210101 is a wasteful number, since it uses less digits than its factorization.

212221111210101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669106 (or 669103 counting only the distinct ones).

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

Adding to 212221111210101 its reverse (101012111122212), we get a palindrome (313233222332313).

The spelling of 212221111210101 in words is "two hundred twelve trillion, two hundred twenty-one billion, one hundred eleven million, two hundred ten thousand, one hundred one".