121525221019 has 2 divisors, whose sum is σ = 121525221020. Its totient is φ = 121525221018.

The previous prime is 121525220981. The next prime is 121525221029. The reversal of 121525221019 is 910122525121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121525221019 - 2²⁷ = 121391003291 is a prime.

It is a super-2 number, since 2×121525221019² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121525221029) 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, 60762610509 + 60762610510.

It is an arithmetic number, because the mean of its divisors is an integer number (60762610510).

Almost surely, 2^121525221019 is an apocalyptic number.

121525221019 is a deficient number, since it is larger than the sum of its proper divisors (1).

121525221019 is an equidigital number, since it uses as much as digits as its factorization.

121525221019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 31.

The spelling of 121525221019 in words is "one hundred twenty-one billion, five hundred twenty-five million, two hundred twenty-one thousand, nineteen".