21150544124 has 12 divisors (see below), whose sum is σ = 37097768400. Its totient is φ = 10551181728.

The previous prime is 21150544087. The next prime is 21150544133. The reversal of 21150544124 is 42144505112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6020609 + ... + 6024120.

It is an arithmetic number, because the mean of its divisors is an integer number (3091480700).

Almost surely, 2^21150544124 is an apocalyptic number.

It is an amenable number.

21150544124 is a deficient number, since it is larger than the sum of its proper divisors (15947224276).

21150544124 is a wasteful number, since it uses less digits than its factorization.

21150544124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12045172 (or 12045170 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

The spelling of 21150544124 in words is "twenty-one billion, one hundred fifty million, five hundred forty-four thousand, one hundred twenty-four".