21020011022101 has 16 divisors (see below), whose sum is σ = 26501777503488. Its totient is φ = 16225578057600.

The previous prime is 21020011022093. The next prime is 21020011022119. The reversal of 21020011022101 is 10122011002012.

It is a cyclic number.

It is not a de Polignac number, because 21020011022101 - 2³ = 21020011022093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020011022501) 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, 2816936905 + ... + 2816944366.

It is an arithmetic number, because the mean of its divisors is an integer number (1656361093968).

Almost surely, 2^{21020011022101} is an apocalyptic number.

It is an amenable number.

21020011022101 is a deficient number, since it is larger than the sum of its proper divisors (5481766481387).

21020011022101 is a wasteful number, since it uses less digits than its factorization.

21020011022101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5633881332.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21020011022101 its reverse (10122011002012), we get a palindrome (31142022024113).

The spelling of 21020011022101 in words is "twenty-one trillion, twenty billion, eleven million, twenty-two thousand, one hundred one".