21230132120012 has 24 divisors (see below), whose sum is σ = 37687590586800. Its totient is φ = 10463336761280.

The previous prime is 21230132119979. The next prime is 21230132120033. The reversal of 21230132120012 is 21002123103212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135880043 + ... + 136036194.

It is an arithmetic number, because the mean of its divisors is an integer number (1570316274450).

Almost surely, 2^{21230132120012} is an apocalyptic number.

It is an amenable number.

21230132120012 is a deficient number, since it is larger than the sum of its proper divisors (16457458466788).

21230132120012 is a wasteful number, since it uses less digits than its factorization.

21230132120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271916521 (or 271916519 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21230132120012 its reverse (21002123103212), we get a palindrome (42232255223224).

The spelling of 21230132120012 in words is "twenty-one trillion, two hundred thirty billion, one hundred thirty-two million, one hundred twenty thousand, twelve".