21020220224013 has 32 divisors (see below), whose sum is σ = 30367272038400. Its totient is φ = 12881781271296.

The previous prime is 21020220223997. The next prime is 21020220224023. The reversal of 21020220224013 is 31042202202012.

It is not a de Polignac number, because 21020220224013 - 2⁴ = 21020220223997 is a prime.

It is a super-3 number, since 3×21020220224013³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020220224023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45029118 + ... + 45493536.

It is an arithmetic number, because the mean of its divisors is an integer number (948977251200).

Almost surely, 2^{21020220224013} is an apocalyptic number.

It is an amenable number.

21020220224013 is a deficient number, since it is larger than the sum of its proper divisors (9347051814387).

21020220224013 is a wasteful number, since it uses less digits than its factorization.

21020220224013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485121.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21020220224013 its reverse (31042202202012), we get a palindrome (52062422426025).

The spelling of 21020220224013 in words is "twenty-one trillion, twenty billion, two hundred twenty million, two hundred twenty-four thousand, thirteen".