16121305402 has 16 divisors (see below), whose sum is σ = 25471031040. Its totient is φ = 7631506368.

The previous prime is 16121305399. The next prime is 16121305439. The reversal of 16121305402 is 20450312161.

It is a happy number.

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, 75823 + ... + 194914.

It is an arithmetic number, because the mean of its divisors is an integer number (1591939440).

Almost surely, 2^16121305402 is an apocalyptic number.

16121305402 is a deficient number, since it is larger than the sum of its proper divisors (9349725638).

16121305402 is a wasteful number, since it uses less digits than its factorization.

16121305402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272325.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 16121305402 its reverse (20450312161), we get a palindrome (36571617563).

The spelling of 16121305402 in words is "sixteen billion, one hundred twenty-one million, three hundred five thousand, four hundred two".