221101020102021 has 16 divisors (see below), whose sum is σ = 298534616540160. Its totient is φ = 145534071786480.

The previous prime is 221101020102019. The next prime is 221101020102041. The reversal of 221101020102021 is 120201020101122.

221101020102021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221101020102021 - 2¹ = 221101020102019 is a prime.

It is a super-2 number, since 2×221101020102021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221101020102041) 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, 43813686 + ... + 48598776.

It is an arithmetic number, because the mean of its divisors is an integer number (18658413533760).

Almost surely, 2^{221101020102021} is an apocalyptic number.

It is an amenable number.

221101020102021 is a deficient number, since it is larger than the sum of its proper divisors (77433596438139).

221101020102021 is a wasteful number, since it uses less digits than its factorization.

221101020102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4980136.

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

Adding to 221101020102021 its reverse (120201020101122), we get a palindrome (341302040203143).

The spelling of 221101020102021 in words is "two hundred twenty-one trillion, one hundred one billion, twenty million, one hundred two thousand, twenty-one".