221021022120111 has 12 divisors (see below), whose sum is σ = 319253218616488. Its totient is φ = 147347056798704.

The previous prime is 221021022120011. The next prime is 221021022120133. The reversal of 221021022120111 is 111021220120122.

221021022120111 is a `hidden beast` number, since 2 + 21 + 0 + 210 + 221 + 201 + 11 = 666.

It is not a de Polignac number, because 221021022120111 - 2¹⁰ = 221021022119087 is a prime.

It is a super-2 number, since 2×221021022120111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221021022120011) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 19416640 + ... + 28619013.

Almost surely, 2^{221021022120111} is an apocalyptic number.

221021022120111 is a deficient number, since it is larger than the sum of its proper divisors (98232196496377).

221021022120111 is a wasteful number, since it uses less digits than its factorization.

221021022120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48546902 (or 48546899 counting only the distinct ones).

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

Adding to 221021022120111 its reverse (111021220120122), we get a palindrome (332042242240233).

The spelling of 221021022120111 in words is "two hundred twenty-one trillion, twenty-one billion, twenty-two million, one hundred twenty thousand, one hundred eleven".