21402432012113 has 16 divisors (see below), whose sum is σ = 21499982493696. Its totient is φ = 21305113315920.

The previous prime is 21402432012107. The next prime is 21402432012151. The reversal of 21402432012113 is 31121023420412.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21402432012113 - 2¹⁰ = 21402432011089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21402432014113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1057892708 + ... + 1057912938.

It is an arithmetic number, because the mean of its divisors is an integer number (1343748905856).

Almost surely, 2^{21402432012113} is an apocalyptic number.

It is an amenable number.

21402432012113 is a deficient number, since it is larger than the sum of its proper divisors (97550481583).

21402432012113 is a wasteful number, since it uses less digits than its factorization.

21402432012113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25724.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 21402432012113 its reverse (31121023420412), we get a palindrome (52523455432525).

The spelling of 21402432012113 in words is "twenty-one trillion, four hundred two billion, four hundred thirty-two million, twelve thousand, one hundred thirteen".