121013131 has 2 divisors, whose sum is σ = 121013132. Its totient is φ = 121013130.

The previous prime is 121013117. The next prime is 121013141. The reversal of 121013131 is 131310121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121013131 - 2⁷ = 121013003 is a prime.

It is a super-2 number, since 2×121013131² = 29288355748846322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121013141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60506565 + 60506566.

It is an arithmetic number, because the mean of its divisors is an integer number (60506566).

Almost surely, 2^121013131 is an apocalyptic number.

121013131 is a deficient number, since it is larger than the sum of its proper divisors (1).

121013131 is an equidigital number, since it uses as much as digits as its factorization.

121013131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 121013131 is about 11000.5968474442. The cubic root of 121013131 is about 494.6266354337.

Adding to 121013131 its reverse (131310121), we get a palindrome (252323252).

It can be divided in two parts, 1210 and 13131, that added together give a palindrome (14341).

The spelling of 121013131 in words is "one hundred twenty-one million, thirteen thousand, one hundred thirty-one".