121122121019 has 2 divisors, whose sum is σ = 121122121020. Its totient is φ = 121122121018.

The previous prime is 121122120997. The next prime is 121122121037. The reversal of 121122121019 is 910121221121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121122121019 is a prime.

It is a super-2 number, since 2×121122121019² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121122120985 and 121122121003.

It is not a weakly prime, because it can be changed into another prime (121122121039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60561060509 + 60561060510.

It is an arithmetic number, because the mean of its divisors is an integer number (60561060510).

Almost surely, 2^121122121019 is an apocalyptic number.

121122121019 is a deficient number, since it is larger than the sum of its proper divisors (1).

121122121019 is an equidigital number, since it uses as much as digits as its factorization.

121122121019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 121122121019 in words is "one hundred twenty-one billion, one hundred twenty-two million, one hundred twenty-one thousand, nineteen".