21031223013101 has 16 divisors (see below), whose sum is σ = 24653072577408. Its totient is φ = 17565712315200.

The previous prime is 21031223013089. The next prime is 21031223013103. The reversal of 21031223013101 is 10131032213012.

It is a happy number.

It is not a de Polignac number, because 21031223013101 - 2³⁸ = 20756345106157 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 (21031223013103) 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, 82855670 + ... + 83109111.

It is an arithmetic number, because the mean of its divisors is an integer number (1540817036088).

Almost surely, 2^{21031223013101} is an apocalyptic number.

It is an amenable number.

21031223013101 is a deficient number, since it is larger than the sum of its proper divisors (3621849564307).

21031223013101 is a wasteful number, since it uses less digits than its factorization.

21031223013101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165965252.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21031223013101 its reverse (10131032213012), we get a palindrome (31162255226113).

The spelling of 21031223013101 in words is "twenty-one trillion, thirty-one billion, two hundred twenty-three million, thirteen thousand, one hundred one".