21131422131402 has 64 divisors (see below), whose sum is σ = 53454980920320. Its totient is φ = 6125049889200.

The previous prime is 21131422131389. The next prime is 21131422131409. The reversal of 21131422131402 is 20413122413112.

21131422131402 is a `hidden beast` number, since 2 + 1 + 1 + 3 + 1 + 4 + 221 + 31 + 402 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 773351224 + ... + 773378547.

It is an arithmetic number, because the mean of its divisors is an integer number (835234076880).

Almost surely, 2^{21131422131402} is an apocalyptic number.

21131422131402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21131422131402 is an abundant number, since it is smaller than the sum of its proper divisors (32323558788918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21131422131402 is a wasteful number, since it uses less digits than its factorization.

21131422131402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546729816 (or 1546729810 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 21131422131402 its reverse (20413122413112), we get a palindrome (41544544544514).

The spelling of 21131422131402 in words is "twenty-one trillion, one hundred thirty-one billion, four hundred twenty-two million, one hundred thirty-one thousand, four hundred two".