221020010121101 has 4 divisors (see below), whose sum is σ = 221622244481472. Its totient is φ = 220417775760732.

The previous prime is 221020010121083. The next prime is 221020010121173. The reversal of 221020010121101 is 101121010020122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221020010121101 - 2²⁶ = 221019943012237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020010111101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301117179635 + ... + 301117180368.

It is an arithmetic number, because the mean of its divisors is an integer number (55405561120368).

Almost surely, 2^{221020010121101} is an apocalyptic number.

It is an amenable number.

221020010121101 is a deficient number, since it is larger than the sum of its proper divisors (602234360371).

221020010121101 is an equidigital number, since it uses as much as digits as its factorization.

221020010121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602234360370.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221020010121101 its reverse (101121010020122), we get a palindrome (322141020141223).

The spelling of 221020010121101 in words is "two hundred twenty-one trillion, twenty billion, ten million, one hundred twenty-one thousand, one hundred one".