21142999987230 has 96 divisors (see below), whose sum is σ = 57867653854080. Its totient is φ = 4902724594240.

The previous prime is 21142999987229. The next prime is 21142999987283. The reversal of 21142999987230 is 3278999924112.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60382800 + ... + 60731939.

It is an arithmetic number, because the mean of its divisors is an integer number (602788060980).

Almost surely, 2^{21142999987230} is an apocalyptic number.

21142999987230 is an abundant number, since it is smaller than the sum of its proper divisors (36724653866850).

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

21142999987230 is a wasteful number, since it uses less digits than its factorization.

21142999987230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121114806 (or 121114783 counting only the distinct ones).

The product of its (nonzero) digits is 35271936, while the sum is 66.

The spelling of 21142999987230 in words is "twenty-one trillion, one hundred forty-two billion, nine hundred ninety-nine million, nine hundred eighty-seven thousand, two hundred thirty".