221002100122111 has 16 divisors (see below), whose sum is σ = 275604543037440. Its totient is φ = 172166017934880.

The previous prime is 221002100122087. The next prime is 221002100122127. The reversal of 221002100122111 is 111221001200122.

It is a cyclic number.

It is not a de Polignac number, because 221002100122111 - 2²³ = 221002091733503 is a prime.

It is a super-2 number, since 2×221002100122111² (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 (221002100522111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 361448656 + ... + 362059573.

It is an arithmetic number, because the mean of its divisors is an integer number (17225283939840).

Almost surely, 2^{221002100122111} is an apocalyptic number.

221002100122111 is a deficient number, since it is larger than the sum of its proper divisors (54602442915329).

221002100122111 is a wasteful number, since it uses less digits than its factorization.

221002100122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723512214.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221002100122111 its reverse (111221001200122), we get a palindrome (332223101322233).

The spelling of 221002100122111 in words is "two hundred twenty-one trillion, two billion, one hundred million, one hundred twenty-two thousand, one hundred eleven".