21512501124132 has 48 divisors (see below), whose sum is σ = 53274775946112. Its totient is φ = 6732989007360.

The previous prime is 21512501124061. The next prime is 21512501124143. The reversal of 21512501124132 is 23142110521512.

It is a self number, because there is not a number n which added to its sum of digits gives 21512501124132.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125155728 + ... + 125327495.

It is an arithmetic number, because the mean of its divisors is an integer number (1109891165544).

Almost surely, 2^{21512501124132} is an apocalyptic number.

It is an amenable number.

21512501124132 is an abundant number, since it is smaller than the sum of its proper divisors (31762274821980).

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

21512501124132 is a wasteful number, since it uses less digits than its factorization.

21512501124132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250483668 (or 250483666 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

Adding to 21512501124132 its reverse (23142110521512), we get a palindrome (44654611645644).

The spelling of 21512501124132 in words is "twenty-one trillion, five hundred twelve billion, five hundred one million, one hundred twenty-four thousand, one hundred thirty-two".