21534350214511 has 2 divisors, whose sum is σ = 21534350214512. Its totient is φ = 21534350214510.

The previous prime is 21534350214479. The next prime is 21534350214539. The reversal of 21534350214511 is 11541205343512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21534350214511 - 2⁵ = 21534350214479 is a prime.

It is a super-2 number, since 2×21534350214511² (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 (21534350214541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10767175107255 + 10767175107256.

It is an arithmetic number, because the mean of its divisors is an integer number (10767175107256).

Almost surely, 2^{21534350214511} is an apocalyptic number.

21534350214511 is a deficient number, since it is larger than the sum of its proper divisors (1).

21534350214511 is an equidigital number, since it uses as much as digits as its factorization.

21534350214511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 21534350214511 in words is "twenty-one trillion, five hundred thirty-four billion, three hundred fifty million, two hundred fourteen thousand, five hundred eleven".