221002020101121 has 32 divisors (see below), whose sum is σ = 339566405713920. Its totient is φ = 125237212442496.

The previous prime is 221002020101113. The next prime is 221002020101129. The reversal of 221002020101121 is 121101020200122.

It is an interprime number because it is at equal distance from previous prime (221002020101113) and next prime (221002020101129).

It is not a de Polignac number, because 221002020101121 - 2³ = 221002020101113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221002020101121.

It is not an unprimeable number, because it can be changed into a prime (221002020101129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12230356 + ... + 24322533.

It is an arithmetic number, because the mean of its divisors is an integer number (10611450178560).

Almost surely, 2^{221002020101121} is an apocalyptic number.

221002020101121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221002020101121 is a deficient number, since it is larger than the sum of its proper divisors (118564385612799).

221002020101121 is a wasteful number, since it uses less digits than its factorization.

221002020101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36555293.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221002020101121 its reverse (121101020200122), we get a palindrome (342103040301243).

Subtracting from 221002020101121 its reverse (121101020200122), we obtain a palindrome (99900999900999).

The spelling of 221002020101121 in words is "two hundred twenty-one trillion, two billion, twenty million, one hundred one thousand, one hundred twenty-one".