21442040402131 has 8 divisors (see below), whose sum is σ = 23316940596960. Its totient is φ = 19635318396288.

The previous prime is 21442040402099. The next prime is 21442040402143. The reversal of 21442040402131 is 13120404024412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21442040402131 - 2⁵ = 21442040402099 is a prime.

It is a super-2 number, since 2×21442040402131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21442040402131.

It is not an unprimeable number, because it can be changed into a prime (21442040402171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17044546591 + ... + 17044547848.

It is an arithmetic number, because the mean of its divisors is an integer number (2914617574620).

Almost surely, 2^{21442040402131} is an apocalyptic number.

21442040402131 is a deficient number, since it is larger than the sum of its proper divisors (1874900194829).

21442040402131 is a wasteful number, since it uses less digits than its factorization.

21442040402131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34089094493.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 21442040402131 its reverse (13120404024412), we get a palindrome (34562444426543).

The spelling of 21442040402131 in words is "twenty-one trillion, four hundred forty-two billion, forty million, four hundred two thousand, one hundred thirty-one".