20221110021 has 16 divisors (see below), whose sum is σ = 30818764800. Its totient is φ = 11552803248.

The previous prime is 20221109989. The next prime is 20221110023. The reversal of 20221110021 is 12001112202.

It is not a de Polignac number, because 20221110021 - 2⁵ = 20221109989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20221109979 and 20221110006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221110023) 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, 33040 + ... + 203798.

It is an arithmetic number, because the mean of its divisors is an integer number (1926172800).

Almost surely, 2^20221110021 is an apocalyptic number.

20221110021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20221110021 is a deficient number, since it is larger than the sum of its proper divisors (10597654779).

20221110021 is a wasteful number, since it uses less digits than its factorization.

20221110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176408.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20221110021 its reverse (12001112202), we get a palindrome (32222222223).

The spelling of 20221110021 in words is "twenty billion, two hundred twenty-one million, one hundred ten thousand, twenty-one".