21122401144 has 32 divisors (see below), whose sum is σ = 42657113520. Its totient is φ = 9747403776.

The previous prime is 21122401121. The next prime is 21122401217. The reversal of 21122401144 is 44110422112.

It is a congruent 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, 1199427 + ... + 1216909.

Almost surely, 2^21122401144 is an apocalyptic number.

It is an amenable number.

21122401144 is an abundant number, since it is smaller than the sum of its proper divisors (21534712376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21122401144 is a wasteful number, since it uses less digits than its factorization.

21122401144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29119 (or 29115 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 21122401144 its reverse (44110422112), we get a palindrome (65232823256).

The spelling of 21122401144 in words is "twenty-one billion, one hundred twenty-two million, four hundred one thousand, one hundred forty-four".