21021142150 has 24 divisors (see below), whose sum is σ = 39104086464. Its totient is φ = 8407432800.

The previous prime is 21021142147. The next prime is 21021142187. The reversal of 21021142150 is 5124112012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 493084 + ... + 534016.

It is an arithmetic number, because the mean of its divisors is an integer number (1629336936).

Almost surely, 2^21021142150 is an apocalyptic number.

21021142150 is a deficient number, since it is larger than the sum of its proper divisors (18082944314).

21021142150 is a wasteful number, since it uses less digits than its factorization.

21021142150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51216 (or 51211 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 21021142150 its reverse (5124112012), we get a palindrome (26145254162).

The spelling of 21021142150 in words is "twenty-one billion, twenty-one million, one hundred forty-two thousand, one hundred fifty".