21501041405419 has 2 divisors, whose sum is σ = 21501041405420. Its totient is φ = 21501041405418.

The previous prime is 21501041405387. The next prime is 21501041405471. The reversal of 21501041405419 is 91450414010512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21501041405419 - 2⁵ = 21501041405387 is a prime.

It is a super-2 number, since 2×21501041405419² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21501041408419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10750520702709 + 10750520702710.

It is an arithmetic number, because the mean of its divisors is an integer number (10750520702710).

Almost surely, 2^{21501041405419} is an apocalyptic number.

21501041405419 is a deficient number, since it is larger than the sum of its proper divisors (1).

21501041405419 is an equidigital number, since it uses as much as digits as its factorization.

21501041405419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 37.

The spelling of 21501041405419 in words is "twenty-one trillion, five hundred one billion, forty-one million, four hundred five thousand, four hundred nineteen".