121321420369 has 2 divisors, whose sum is σ = 121321420370. Its totient is φ = 121321420368.

The previous prime is 121321420351. The next prime is 121321420411. The reversal of 121321420369 is 963024123121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87209177344 + 34112243025 = 295312^2 + 184695^2 .

It is an emirp because it is prime and its reverse (963024123121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121321420369 - 2³⁵ = 86961682001 is a prime.

It is a super-2 number, since 2×121321420369² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121321421369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60660710184 + 60660710185.

It is an arithmetic number, because the mean of its divisors is an integer number (60660710185).

Almost surely, 2^121321420369 is an apocalyptic number.

It is an amenable number.

121321420369 is a deficient number, since it is larger than the sum of its proper divisors (1).

121321420369 is an equidigital number, since it uses as much as digits as its factorization.

121321420369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 121321420369 in words is "one hundred twenty-one billion, three hundred twenty-one million, four hundred twenty thousand, three hundred sixty-nine".