400020401400131 has 12 divisors (see below), whose sum is σ = 426281052807792. Its totient is φ = 375287407717104.

The previous prime is 400020401400101. The next prime is 400020401400161. The reversal of 400020401400131 is 131004104020004.

It is an interprime number because it is at equal distance from previous prime (400020401400101) and next prime (400020401400161).

It is not a de Polignac number, because 400020401400131 - 2¹⁴ = 400020401383747 is a prime.

It is a super-2 number, since 2×400020401400131² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400020401400101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5379039296 + ... + 5379113661.

It is an arithmetic number, because the mean of its divisors is an integer number (35523421067316).

Almost surely, 2^{400020401400131} is an apocalyptic number.

400020401400131 is a deficient number, since it is larger than the sum of its proper divisors (26260651407661).

400020401400131 is a wasteful number, since it uses less digits than its factorization.

400020401400131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10758153098 (or 10758153079 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 400020401400131 its reverse (131004104020004), we get a palindrome (531024505420135).

The spelling of 400020401400131 in words is "four hundred trillion, twenty billion, four hundred one million, four hundred thousand, one hundred thirty-one".