21320420112412 has 48 divisors (see below), whose sum is σ = 38767962562560. Its totient is φ = 10247187690432.

The previous prime is 21320420112371. The next prime is 21320420112421. The reversal of 21320420112412 is 21421102402312.

It is a congruent number.

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, 30386293 + ... + 31080019.

It is an arithmetic number, because the mean of its divisors is an integer number (807665886720).

Almost surely, 2^{21320420112412} is an apocalyptic number.

It is an amenable number.

21320420112412 is a deficient number, since it is larger than the sum of its proper divisors (17447542450148).

21320420112412 is a wasteful number, since it uses less digits than its factorization.

21320420112412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694930 (or 694928 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 21320420112412 its reverse (21421102402312), we get a palindrome (42741522514724).

The spelling of 21320420112412 in words is "twenty-one trillion, three hundred twenty billion, four hundred twenty million, one hundred twelve thousand, four hundred twelve".