31403421121 has 8 divisors (see below), whose sum is σ = 31493067840. Its totient is φ = 31313820912.

The previous prime is 31403421089. The next prime is 31403421131. The reversal of 31403421121 is 12112430413.

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 31403421121 - 2⁵ = 31403421089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31403421092 and 31403421101.

It is not an unprimeable number, because it can be changed into a prime (31403421131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1687956 + ... + 1706458.

It is an arithmetic number, because the mean of its divisors is an integer number (3936633480).

Almost surely, 2^31403421121 is an apocalyptic number.

It is an amenable number.

31403421121 is a deficient number, since it is larger than the sum of its proper divisors (89646719).

31403421121 is a wasteful number, since it uses less digits than its factorization.

31403421121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23255.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 31403421121 its reverse (12112430413), we get a palindrome (43515851534).

The spelling of 31403421121 in words is "thirty-one billion, four hundred three million, four hundred twenty-one thousand, one hundred twenty-one".