121312049 has 2 divisors, whose sum is σ = 121312050. Its totient is φ = 121312048.

The previous prime is 121312043. The next prime is 121312069. The reversal of 121312049 is 940213121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105431824 + 15880225 = 10268^2 + 3985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121312049 is a prime.

It is a super-2 number, since 2×121312049² = 29433226465156802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121312043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60656024 + 60656025.

It is an arithmetic number, because the mean of its divisors is an integer number (60656025).

Almost surely, 2^121312049 is an apocalyptic number.

It is an amenable number.

121312049 is a deficient number, since it is larger than the sum of its proper divisors (1).

121312049 is an equidigital number, since it uses as much as digits as its factorization.

121312049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 121312049 is about 11014.1749123573. The cubic root of 121312049 is about 495.0335643669.

The spelling of 121312049 in words is "one hundred twenty-one million, three hundred twelve thousand, forty-nine".