121145520131 has 2 divisors, whose sum is σ = 121145520132. Its totient is φ = 121145520130.

The previous prime is 121145520107. The next prime is 121145520203. The reversal of 121145520131 is 131025541121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121145520131 - 2¹⁴ = 121145503747 is a prime.

It is a super-3 number, since 3×121145520131³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 121145520131.

It is not a weakly prime, because it can be changed into another prime (121145522131) 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, 60572760065 + 60572760066.

It is an arithmetic number, because the mean of its divisors is an integer number (60572760066).

Almost surely, 2^121145520131 is an apocalyptic number.

121145520131 is a deficient number, since it is larger than the sum of its proper divisors (1).

121145520131 is an equidigital number, since it uses as much as digits as its factorization.

121145520131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 26.

The spelling of 121145520131 in words is "one hundred twenty-one billion, one hundred forty-five million, five hundred twenty thousand, one hundred thirty-one".