31403421123 has 16 divisors (see below), whose sum is σ = 42496252320. Its totient is φ = 20623797504.

The previous prime is 31403421089. The next prime is 31403421131. The reversal of 31403421123 is 32112430413.

It is a happy number.

It is not a de Polignac number, because 31403421123 - 2⁹ = 31403420611 is a prime.

It is a super-2 number, since 2×31403421123² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31403421093 and 31403421102.

It is not an unprimeable number, because it can be changed into a prime (31403421143) 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, 95065 + ... + 268037.

It is an arithmetic number, because the mean of its divisors is an integer number (2656015770).

Almost surely, 2^31403421123 is an apocalyptic number.

31403421123 is a deficient number, since it is larger than the sum of its proper divisors (11092831197).

31403421123 is a wasteful number, since it uses less digits than its factorization.

31403421123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173878.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31403421123 its reverse (32112430413), we get a palindrome (63515851536).

The spelling of 31403421123 in words is "thirty-one billion, four hundred three million, four hundred twenty-one thousand, one hundred twenty-three".