21012611075419 has 2 divisors, whose sum is σ = 21012611075420. Its totient is φ = 21012611075418.

The previous prime is 21012611075399. The next prime is 21012611075431. The reversal of 21012611075419 is 91457011621012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21012611075419 - 2⁴³ = 12216518053211 is a prime.

It is a super-2 number, since 2×21012611075419² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21012611075459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506305537709 + 10506305537710.

It is an arithmetic number, because the mean of its divisors is an integer number (10506305537710).

Almost surely, 2^{21012611075419} is an apocalyptic number.

21012611075419 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012611075419 is an equidigital number, since it uses as much as digits as its factorization.

21012611075419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 40.

The spelling of 21012611075419 in words is "twenty-one trillion, twelve billion, six hundred eleven million, seventy-five thousand, four hundred nineteen".