121321290269 has 2 divisors, whose sum is σ = 121321290270. Its totient is φ = 121321290268.

The previous prime is 121321290263. The next prime is 121321290283. The reversal of 121321290269 is 962092123121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120846616900 + 474673369 = 347630^2 + 21787^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121321290269 is a prime.

It is a super-2 number, since 2×121321290269² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121321290263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60660645134 + 60660645135.

It is an arithmetic number, because the mean of its divisors is an integer number (60660645135).

Almost surely, 2^121321290269 is an apocalyptic number.

It is an amenable number.

121321290269 is a deficient number, since it is larger than the sum of its proper divisors (1).

121321290269 is an equidigital number, since it uses as much as digits as its factorization.

121321290269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The spelling of 121321290269 in words is "one hundred twenty-one billion, three hundred twenty-one million, two hundred ninety thousand, two hundred sixty-nine".