21020122022101 has 16 divisors (see below), whose sum is σ = 21968776972800. Its totient is φ = 20074385579248.

The previous prime is 21020122022089. The next prime is 21020122022227. The reversal of 21020122022101 is 10122022102012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21020122022101 - 2⁷ = 21020122021973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020122022401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38800470 + ... + 39338488.

It is an arithmetic number, because the mean of its divisors is an integer number (1373048560800).

Almost surely, 2^{21020122022101} is an apocalyptic number.

It is an amenable number.

21020122022101 is a deficient number, since it is larger than the sum of its proper divisors (948654950699).

21020122022101 is a wasteful number, since it uses less digits than its factorization.

21020122022101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540728.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21020122022101 its reverse (10122022102012), we get a palindrome (31142144124113).

The spelling of 21020122022101 in words is "twenty-one trillion, twenty billion, one hundred twenty-two million, twenty-two thousand, one hundred one".