22012011021 has 64 divisors (see below), whose sum is σ = 39613464576. Its totient is φ = 10499673600.

The previous prime is 22012011013. The next prime is 22012011023. The reversal of 22012011021 is 12011021022.

It is not a de Polignac number, because 22012011021 - 2³ = 22012011013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22012010988 and 22012011006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012011023) 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, 554385 + ... + 592761.

It is an arithmetic number, because the mean of its divisors is an integer number (618960384).

Almost surely, 2^22012011021 is an apocalyptic number.

22012011021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22012011021 is a deficient number, since it is larger than the sum of its proper divisors (17601453555).

22012011021 is a wasteful number, since it uses less digits than its factorization.

22012011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38602.

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

Adding to 22012011021 its reverse (12011021022), we get a palindrome (34023032043).

The spelling of 22012011021 in words is "twenty-two billion, twelve million, eleven thousand, twenty-one".