121212100319 has 2 divisors, whose sum is σ = 121212100320. Its totient is φ = 121212100318.

The previous prime is 121212100309. The next prime is 121212100357. The reversal of 121212100319 is 913001212121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121212100319 - 2²⁴ = 121195323103 is a prime.

It is a super-2 number, since 2×121212100319² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 121212100294 and 121212100303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121212100309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60606050159 + 60606050160.

It is an arithmetic number, because the mean of its divisors is an integer number (60606050160).

Almost surely, 2^121212100319 is an apocalyptic number.

121212100319 is a deficient number, since it is larger than the sum of its proper divisors (1).

121212100319 is an equidigital number, since it uses as much as digits as its factorization.

121212100319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 121212100319 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred thousand, three hundred nineteen".