21131422131403 has 16 divisors (see below), whose sum is σ = 22796962893216. Its totient is φ = 19512839324160.

The previous prime is 21131422131389. The next prime is 21131422131409. The reversal of 21131422131403 is 30413122413112.

It is a cyclic number.

It is not a de Polignac number, because 21131422131403 - 2⁵ = 21131422131371 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 74175013 + ... + 74459353.

It is an arithmetic number, because the mean of its divisors is an integer number (1424810180826).

Almost surely, 2^{21131422131403} is an apocalyptic number.

21131422131403 is a deficient number, since it is larger than the sum of its proper divisors (1665540761813).

21131422131403 is a wasteful number, since it uses less digits than its factorization.

21131422131403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366894.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 21131422131403 its reverse (30413122413112), we get a palindrome (51544544544515).

The spelling of 21131422131403 in words is "twenty-one trillion, one hundred thirty-one billion, four hundred twenty-two million, one hundred thirty-one thousand, four hundred three".