121326131 has 2 divisors, whose sum is σ = 121326132. Its totient is φ = 121326130.

The previous prime is 121326109. The next prime is 121326137. The reversal of 121326131 is 131623121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121326131 is a prime.

It is a super-2 number, since 2×121326131² = 29440060126858322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121326137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60663065 + 60663066.

It is an arithmetic number, because the mean of its divisors is an integer number (60663066).

Almost surely, 2^121326131 is an apocalyptic number.

121326131 is a deficient number, since it is larger than the sum of its proper divisors (1).

121326131 is an equidigital number, since it uses as much as digits as its factorization.

121326131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 20.

The square root of 121326131 is about 11014.8141609380. The cubic root of 121326131 is about 495.0527182569.

Adding to 121326131 its reverse (131623121), we get a palindrome (252949252).

The spelling of 121326131 in words is "one hundred twenty-one million, three hundred twenty-six thousand, one hundred thirty-one".