21020032222113 has 4 divisors (see below), whose sum is σ = 28026709629488. Its totient is φ = 14013354814740.

The previous prime is 21020032222073. The next prime is 21020032222121. The reversal of 21020032222113 is 31122223002012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21020032222113 - 2¹⁶ = 21020032156577 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21020032222113.

It is not an unprimeable number, because it can be changed into a prime (21020032227113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3503338703683 + ... + 3503338703688.

It is an arithmetic number, because the mean of its divisors is an integer number (7006677407372).

Almost surely, 2^{21020032222113} is an apocalyptic number.

It is an amenable number.

21020032222113 is a deficient number, since it is larger than the sum of its proper divisors (7006677407375).

21020032222113 is an equidigital number, since it uses as much as digits as its factorization.

21020032222113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7006677407374.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21020032222113 its reverse (31122223002012), we get a palindrome (52142255224125).

The spelling of 21020032222113 in words is "twenty-one trillion, twenty billion, thirty-two million, two hundred twenty-two thousand, one hundred thirteen".