221100021010101 has 16 divisors (see below), whose sum is σ = 297558544555584. Its totient is φ = 146020786996224.

The previous prime is 221100021010097. The next prime is 221100021010133. The reversal of 221100021010101 is 101010120001122.

It is not a de Polignac number, because 221100021010101 - 2² = 221100021010097 is a prime.

It is a super-4 number, since 4×221100021010101⁴ (a number of 58 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221100021010201) 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, 24755175 + ... + 32481051.

It is an arithmetic number, because the mean of its divisors is an integer number (18597409034724).

Almost surely, 2^{221100021010101} is an apocalyptic number.

It is an amenable number.

221100021010101 is a deficient number, since it is larger than the sum of its proper divisors (76458523545483).

221100021010101 is a wasteful number, since it uses less digits than its factorization.

221100021010101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7815140.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 221100021010101 its reverse (101010120001122), we get a palindrome (322110141011223).

The spelling of 221100021010101 in words is "two hundred twenty-one trillion, one hundred billion, twenty-one million, ten thousand, one hundred one".