121311513019 has 2 divisors, whose sum is σ = 121311513020. Its totient is φ = 121311513018.

The previous prime is 121311512983. The next prime is 121311513061. The reversal of 121311513019 is 910315113121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121311513019 - 2¹³ = 121311504827 is a prime.

It is a super-2 number, since 2×121311513019² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121311513079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60655756509 + 60655756510.

It is an arithmetic number, because the mean of its divisors is an integer number (60655756510).

Almost surely, 2^121311513019 is an apocalyptic number.

121311513019 is a deficient number, since it is larger than the sum of its proper divisors (1).

121311513019 is an equidigital number, since it uses as much as digits as its factorization.

121311513019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 28.

The spelling of 121311513019 in words is "one hundred twenty-one billion, three hundred eleven million, five hundred thirteen thousand, nineteen".