21402431142401 has 32 divisors (see below), whose sum is σ = 22175970048000. Its totient is φ = 20645346641920.

The previous prime is 21402431142341. The next prime is 21402431142467. The reversal of 21402431142401 is 10424113420412.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21402431142401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21402431144401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3647931470 + ... + 3647937336.

It is an arithmetic number, because the mean of its divisors is an integer number (692999064000).

Almost surely, 2^{21402431142401} is an apocalyptic number.

It is an amenable number.

21402431142401 is a deficient number, since it is larger than the sum of its proper divisors (773538905599).

21402431142401 is a wasteful number, since it uses less digits than its factorization.

21402431142401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10249.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 21402431142401 its reverse (10424113420412), we get a palindrome (31826544562813).

The spelling of 21402431142401 in words is "twenty-one trillion, four hundred two billion, four hundred thirty-one million, one hundred forty-two thousand, four hundred one".