21020313223011 has 4 divisors (see below), whose sum is σ = 28027084297352. Its totient is φ = 14013542148672.

The previous prime is 21020313222983. The next prime is 21020313223099. The reversal of 21020313223011 is 11032231302012.

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

It is a de Polignac number, because none of the positive numbers 2^k-21020313223011 is a prime.

It is a super-2 number, since 2×21020313223011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020313223711) 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, 3503385537166 + ... + 3503385537171.

It is an arithmetic number, because the mean of its divisors is an integer number (7006771074338).

Almost surely, 2^{21020313223011} is an apocalyptic number.

21020313223011 is a deficient number, since it is larger than the sum of its proper divisors (7006771074341).

21020313223011 is an equidigital number, since it uses as much as digits as its factorization.

21020313223011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7006771074340.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21020313223011 its reverse (11032231302012), we get a palindrome (32052544525023).

The spelling of 21020313223011 in words is "twenty-one trillion, twenty billion, three hundred thirteen million, two hundred twenty-three thousand, eleven".