221110011102021 has 64 divisors (see below), whose sum is σ = 320411473305600. Its totient is φ = 135291291206400.

The previous prime is 221110011101893. The next prime is 221110011102031. The reversal of 221110011102021 is 120201110011122.

It is a happy number.

It is not a de Polignac number, because 221110011102021 - 2⁷ = 221110011101893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221110011102031) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 120668730 + ... + 122487396.

It is an arithmetic number, because the mean of its divisors is an integer number (5006429270400).

Almost surely, 2^{221110011102021} is an apocalyptic number.

It is an amenable number.

221110011102021 is a deficient number, since it is larger than the sum of its proper divisors (99301462203579).

221110011102021 is a wasteful number, since it uses less digits than its factorization.

221110011102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819530.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221110011102021 its reverse (120201110011122), we get a palindrome (341311121113143).

The spelling of 221110011102021 in words is "two hundred twenty-one trillion, one hundred ten billion, eleven million, one hundred two thousand, twenty-one".