21434222155499 has 4 divisors (see below), whose sum is σ = 22366144857936. Its totient is φ = 20502299453064.

The previous prime is 21434222155459. The next prime is 21434222155517. The reversal of 21434222155499 is 99455122243412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21434222155499 is a prime.

It is a super-2 number, since 2×21434222155499² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21434222155499.

It is not an unprimeable number, because it can be changed into a prime (21434222155459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 465961351184 + ... + 465961351229.

It is an arithmetic number, because the mean of its divisors is an integer number (5591536214484).

Almost surely, 2^{21434222155499} is an apocalyptic number.

21434222155499 is a deficient number, since it is larger than the sum of its proper divisors (931922702437).

21434222155499 is an equidigital number, since it uses as much as digits as its factorization.

21434222155499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931922702436.

The product of its digits is 6220800, while the sum is 53.

The spelling of 21434222155499 in words is "twenty-one trillion, four hundred thirty-four billion, two hundred twenty-two million, one hundred fifty-five thousand, four hundred ninety-nine".