12100121357 has 2 divisors, whose sum is σ = 12100121358. Its totient is φ = 12100121356.

The previous prime is 12100121339. The next prime is 12100121393. The reversal of 12100121357 is 75312100121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11258483236 + 841638121 = 106106^2 + 29011^2 .

It is a cyclic number.

It is not a de Polignac number, because 12100121357 - 2¹² = 12100117261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12100121317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050060678 + 6050060679.

It is an arithmetic number, because the mean of its divisors is an integer number (6050060679).

Almost surely, 2^12100121357 is an apocalyptic number.

It is an amenable number.

12100121357 is a deficient number, since it is larger than the sum of its proper divisors (1).

12100121357 is an equidigital number, since it uses as much as digits as its factorization.

12100121357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 23.

Adding to 12100121357 its reverse (75312100121), we get a palindrome (87412221478).

The spelling of 12100121357 in words is "twelve billion, one hundred million, one hundred twenty-one thousand, three hundred fifty-seven".