21052015011107 has 2 divisors, whose sum is σ = 21052015011108. Its totient is φ = 21052015011106.

The previous prime is 21052015011031. The next prime is 21052015011127. The reversal of 21052015011107 is 70111051025012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21052015011107 is a prime.

It is a super-2 number, since 2×21052015011107² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21052015011127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10526007505553 + 10526007505554.

It is an arithmetic number, because the mean of its divisors is an integer number (10526007505554).

Almost surely, 2^{21052015011107} is an apocalyptic number.

21052015011107 is a deficient number, since it is larger than the sum of its proper divisors (1).

21052015011107 is an equidigital number, since it uses as much as digits as its factorization.

21052015011107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 700, while the sum is 26.

Adding to 21052015011107 its reverse (70111051025012), we get a palindrome (91163066036119).

The spelling of 21052015011107 in words is "twenty-one trillion, fifty-two billion, fifteen million, eleven thousand, one hundred seven".