22021220001013 has 4 divisors (see below), whose sum is σ = 22039374346828. Its totient is φ = 22003065655200.

The previous prime is 22021220000959. The next prime is 22021220001017. The reversal of 22021220001013 is 31010002212022.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6336507286564 + 15684712714449 = 2517242^2 + 3960393^2 .

It is a cyclic number.

It is not a de Polignac number, because 22021220001013 - 2²⁹ = 22020683130101 is a prime.

It is a super-4 number, since 4×22021220001013⁴ (a number of 54 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021220001017) 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, 9077171088 + ... + 9077173513.

It is an arithmetic number, because the mean of its divisors is an integer number (5509843586707).

Almost surely, 2^{22021220001013} is an apocalyptic number.

It is an amenable number.

22021220001013 is a deficient number, since it is larger than the sum of its proper divisors (18154345815).

22021220001013 is a wasteful number, since it uses less digits than its factorization.

22021220001013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18154345814.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 22021220001013 its reverse (31010002212022), we get a palindrome (53031222213035).

The spelling of 22021220001013 in words is "twenty-two trillion, twenty-one billion, two hundred twenty million, one thousand, thirteen".