21142101308 has 24 divisors (see below), whose sum is σ = 39852718080. Its totient is φ = 9785262960.

The previous prime is 21142101307. The next prime is 21142101311. The reversal of 21142101308 is 80310124112.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142101307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3703688 + ... + 3709391.

It is an arithmetic number, because the mean of its divisors is an integer number (1660529920).

Almost surely, 2^21142101308 is an apocalyptic number.

It is an amenable number.

21142101308 is a deficient number, since it is larger than the sum of its proper divisors (18710616772).

21142101308 is a wasteful number, since it uses less digits than its factorization.

21142101308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7413137 (or 7413135 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The spelling of 21142101308 in words is "twenty-one billion, one hundred forty-two million, one hundred one thousand, three hundred eight".