21131422131401 has 32 divisors (see below), whose sum is σ = 23241404044800. Its totient is φ = 19135116000000.

The previous prime is 21131422131389. The next prime is 21131422131409. The reversal of 21131422131401 is 10413122413112.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21131422131401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21131422131409) 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, 550981376 + ... + 551019726.

It is an arithmetic number, because the mean of its divisors is an integer number (726293876400).

Almost surely, 2^{21131422131401} is an apocalyptic number.

It is an amenable number.

21131422131401 is a deficient number, since it is larger than the sum of its proper divisors (2109981913399).

21131422131401 is a wasteful number, since it uses less digits than its factorization.

21131422131401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48401.

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 21131422131401 its reverse (10413122413112), we get a palindrome (31544544544513).

The spelling of 21131422131401 in words is "twenty-one trillion, one hundred thirty-one billion, four hundred twenty-two million, one hundred thirty-one thousand, four hundred one".