21012133120919 has 2 divisors, whose sum is σ = 21012133120920. Its totient is φ = 21012133120918.

The previous prime is 21012133120879. The next prime is 21012133121029. The reversal of 21012133120919 is 91902133121012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21012133120919 - 2²⁰ = 21012132072343 is a prime.

It is a super-2 number, since 2×21012133120919² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21012133110919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506066560459 + 10506066560460.

It is an arithmetic number, because the mean of its divisors is an integer number (10506066560460).

Almost surely, 2^{21012133120919} is an apocalyptic number.

21012133120919 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012133120919 is an equidigital number, since it uses as much as digits as its factorization.

21012133120919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 35.

The spelling of 21012133120919 in words is "twenty-one trillion, twelve billion, one hundred thirty-three million, one hundred twenty thousand, nine hundred nineteen".