10521252111949 has 2 divisors, whose sum is σ = 10521252111950. Its totient is φ = 10521252111948.

The previous prime is 10521252111941. The next prime is 10521252112087. The reversal of 10521252111949 is 94911125212501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7272541465225 + 3248710646724 = 2696765^2 + 1802418^2 .

It is a cyclic number.

It is not a de Polignac number, because 10521252111949 - 2³ = 10521252111941 is a prime.

It is a super-2 number, since 2×10521252111949² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10521252111941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5260626055974 + 5260626055975.

It is an arithmetic number, because the mean of its divisors is an integer number (5260626055975).

Almost surely, 2^{10521252111949} is an apocalyptic number.

It is an amenable number.

10521252111949 is a deficient number, since it is larger than the sum of its proper divisors (1).

10521252111949 is an equidigital number, since it uses as much as digits as its factorization.

10521252111949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 43.

The spelling of 10521252111949 in words is "ten trillion, five hundred twenty-one billion, two hundred fifty-two million, one hundred eleven thousand, nine hundred forty-nine".