21457377122 has 16 divisors (see below), whose sum is σ = 34454311200. Its totient is φ = 9991748160.

The previous prime is 21457377079. The next prime is 21457377131. The reversal of 21457377122 is 22177375412.

It is a self number, because there is not a number n which added to its sum of digits gives 21457377122.

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, 4783079 + ... + 4787562.

It is an arithmetic number, because the mean of its divisors is an integer number (2153394450).

Almost surely, 2^21457377122 is an apocalyptic number.

21457377122 is a deficient number, since it is larger than the sum of its proper divisors (12996934078).

21457377122 is a wasteful number, since it uses less digits than its factorization.

21457377122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9570721.

The product of its digits is 164640, while the sum is 41.

The spelling of 21457377122 in words is "twenty-one billion, four hundred fifty-seven million, three hundred seventy-seven thousand, one hundred twenty-two".