31403351543121 has 24 divisors (see below), whose sum is σ = 45377512637184. Its totient is φ = 20927669574240.

The previous prime is 31403351543111. The next prime is 31403351543153. The reversal of 31403351543121 is 12134515330413.

31403351543121 is a `hidden beast` number, since 3 + 1 + 4 + 0 + 335 + 1 + 5 + 4 + 312 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-31403351543121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31403351543111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 264521386 + ... + 264640076.

It is an arithmetic number, because the mean of its divisors is an integer number (1890729693216).

Almost surely, 2^{31403351543121} is an apocalyptic number.

It is an amenable number.

31403351543121 is a deficient number, since it is larger than the sum of its proper divisors (13974161094063).

31403351543121 is a wasteful number, since it uses less digits than its factorization.

31403351543121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129541 (or 129538 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

Adding to 31403351543121 its reverse (12134515330413), we get a palindrome (43537866873534).

The spelling of 31403351543121 in words is "thirty-one trillion, four hundred three billion, three hundred fifty-one million, five hundred forty-three thousand, one hundred twenty-one".