121261031 has 2 divisors, whose sum is σ = 121261032. Its totient is φ = 121261030.

The previous prime is 121261013. The next prime is 121261033. The reversal of 121261031 is 130162121.

Together with previous prime (121261013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121261031 - 2¹⁴ = 121244647 is a prime.

It is a super-2 number, since 2×121261031² = 29408475278365922, which contains 22 as substring.

Together with 121261033, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121261033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60630515 + 60630516.

It is an arithmetic number, because the mean of its divisors is an integer number (60630516).

Almost surely, 2^121261031 is an apocalyptic number.

121261031 is a deficient number, since it is larger than the sum of its proper divisors (1).

121261031 is an equidigital number, since it uses as much as digits as its factorization.

121261031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 121261031 is about 11011.8586532883. The cubic root of 121261031 is about 494.9641588851.

The spelling of 121261031 in words is "one hundred twenty-one million, two hundred sixty-one thousand, thirty-one".