21032118122434 has 16 divisors (see below), whose sum is σ = 31702340478528. Its totient is φ = 10464715695952.

The previous prime is 21032118122423. The next prime is 21032118122459. The reversal of 21032118122434 is 43422181123012.

It is a self number, because there is not a number n which added to its sum of digits gives 21032118122434.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10151269 + ... + 12046264.

It is an arithmetic number, because the mean of its divisors is an integer number (1981396279908).

Almost surely, 2^{21032118122434} is an apocalyptic number.

21032118122434 is a deficient number, since it is larger than the sum of its proper divisors (10670222356094).

21032118122434 is a wasteful number, since it uses less digits than its factorization.

21032118122434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22199849.

The product of its (nonzero) digits is 18432, while the sum is 34.

Adding to 21032118122434 its reverse (43422181123012), we get a palindrome (64454299245446).

The spelling of 21032118122434 in words is "twenty-one trillion, thirty-two billion, one hundred eighteen million, one hundred twenty-two thousand, four hundred thirty-four".