31413020121 has 24 divisors (see below), whose sum is σ = 54906793344. Its totient is φ = 16894396800.

The previous prime is 31413020069. The next prime is 31413020137. The reversal of 31413020121 is 12102031413.

31413020121 is a `hidden beast` number, since 31 + 413 + 0 + 201 + 21 = 666.

It is not a de Polignac number, because 31413020121 - 2³⁰ = 30339278297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31413020094 and 31413020103.

It is not an unprimeable number, because it can be changed into a prime (31413020021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14664205 + ... + 14666346.

It is an arithmetic number, because the mean of its divisors is an integer number (2287783056).

Almost surely, 2^31413020121 is an apocalyptic number.

It is an amenable number.

31413020121 is a deficient number, since it is larger than the sum of its proper divisors (23493773223).

31413020121 is a wasteful number, since it uses less digits than its factorization.

31413020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29330581 (or 29330578 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31413020121 its reverse (12102031413), we get a palindrome (43515051534).

The spelling of 31413020121 in words is "thirty-one billion, four hundred thirteen million, twenty thousand, one hundred twenty-one".