21031022315011 has 2 divisors, whose sum is σ = 21031022315012. Its totient is φ = 21031022315010.

The previous prime is 21031022314969. The next prime is 21031022315063. The reversal of 21031022315011 is 11051322013012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21031022315011 is a prime.

It is a super-2 number, since 2×21031022315011² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21031022315411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515511157505 + 10515511157506.

It is an arithmetic number, because the mean of its divisors is an integer number (10515511157506).

Almost surely, 2^{21031022315011} is an apocalyptic number.

21031022315011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21031022315011 is an equidigital number, since it uses as much as digits as its factorization.

21031022315011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 21031022315011 its reverse (11051322013012), we get a palindrome (32082344328023).

The spelling of 21031022315011 in words is "twenty-one trillion, thirty-one billion, twenty-two million, three hundred fifteen thousand, eleven".