121022717819 has 2 divisors, whose sum is σ = 121022717820. Its totient is φ = 121022717818.

The previous prime is 121022717801. The next prime is 121022717861. The reversal of 121022717819 is 918717220121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121022717819 - 2¹² = 121022713723 is a prime.

It is a super-2 number, since 2×121022717819² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121022717419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60511358909 + 60511358910.

It is an arithmetic number, because the mean of its divisors is an integer number (60511358910).

Almost surely, 2^121022717819 is an apocalyptic number.

121022717819 is a deficient number, since it is larger than the sum of its proper divisors (1).

121022717819 is an equidigital number, since it uses as much as digits as its factorization.

121022717819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 41.

The spelling of 121022717819 in words is "one hundred twenty-one billion, twenty-two million, seven hundred seventeen thousand, eight hundred nineteen".