21122122012201 has 32 divisors (see below), whose sum is σ = 24343259443200. Its totient is φ = 17952454263744.

The previous prime is 21122122012193. The next prime is 21122122012219. The reversal of 21122122012201 is 10221022122112.

It is not a de Polignac number, because 21122122012201 - 2³ = 21122122012193 is a prime.

It is a super-2 number, since 2×21122122012201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21122122012301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1218598731 + ... + 1218616063.

It is an arithmetic number, because the mean of its divisors is an integer number (760726857600).

Almost surely, 2^{21122122012201} is an apocalyptic number.

It is an amenable number.

21122122012201 is a deficient number, since it is larger than the sum of its proper divisors (3221137430999).

21122122012201 is a wasteful number, since it uses less digits than its factorization.

21122122012201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19885.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21122122012201 its reverse (10221022122112), we get a palindrome (31343144134313).

The spelling of 21122122012201 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twenty-two million, twelve thousand, two hundred one".