121261743397 has 2 divisors, whose sum is σ = 121261743398. Its totient is φ = 121261743396.

The previous prime is 121261743391. The next prime is 121261743439. The reversal of 121261743397 is 793347162121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121044151396 + 217592001 = 347914^2 + 14751^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121261743397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121261743391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60630871698 + 60630871699.

It is an arithmetic number, because the mean of its divisors is an integer number (60630871699).

Almost surely, 2^121261743397 is an apocalyptic number.

It is an amenable number.

121261743397 is a deficient number, since it is larger than the sum of its proper divisors (1).

121261743397 is an equidigital number, since it uses as much as digits as its factorization.

121261743397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 46.

The spelling of 121261743397 in words is "one hundred twenty-one billion, two hundred sixty-one million, seven hundred forty-three thousand, three hundred ninety-seven".