10121564357 has 2 divisors, whose sum is σ = 10121564358. Its totient is φ = 10121564356.

The previous prime is 10121564317. The next prime is 10121564371. The reversal of 10121564357 is 75346512101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9926933956 + 194630401 = 99634^2 + 13951^2 .

It is a cyclic number.

It is not a de Polignac number, because 10121564357 - 2¹² = 10121560261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10121564317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060782178 + 5060782179.

It is an arithmetic number, because the mean of its divisors is an integer number (5060782179).

Almost surely, 2^10121564357 is an apocalyptic number.

It is an amenable number.

10121564357 is a deficient number, since it is larger than the sum of its proper divisors (1).

10121564357 is an equidigital number, since it uses as much as digits as its factorization.

10121564357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 10121564357 in words is "ten billion, one hundred twenty-one million, five hundred sixty-four thousand, three hundred fifty-seven".