999240422131 has 8 divisors (see below), whose sum is σ = 1143934525440. Its totient is φ = 855032686728.

The previous prime is 999240422129. The next prime is 999240422183. The reversal of 999240422131 is 131224042999.

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 999240422131 - 2¹ = 999240422129 is a prime.

It is a super-2 number, since 2×999240422131² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (999240422101) 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, 121587571 + ... + 121595788.

It is an arithmetic number, because the mean of its divisors is an integer number (142991815680).

Almost surely, 2^999240422131 is an apocalyptic number.

999240422131 is a deficient number, since it is larger than the sum of its proper divisors (144694103309).

999240422131 is a wasteful number, since it uses less digits than its factorization.

999240422131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243183953.

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 999240422131 in words is "nine hundred ninety-nine billion, two hundred forty million, four hundred twenty-two thousand, one hundred thirty-one".