11372857421 has 8 divisors (see below), whose sum is σ = 12064971384. Its totient is φ = 10683312640.

The previous prime is 11372857393. The next prime is 11372857427. The reversal of 11372857421 is 12475827311.

It can be written as a sum of positive squares in 4 ways, for example, as 4929584521 + 6443272900 = 70211^2 + 80270^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11372857421 - 2³⁰ = 10299115597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11372857427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 633170 + ... + 650883.

It is an arithmetic number, because the mean of its divisors is an integer number (1508121423).

Almost surely, 2^11372857421 is an apocalyptic number.

It is an amenable number.

11372857421 is a deficient number, since it is larger than the sum of its proper divisors (692113963).

11372857421 is a wasteful number, since it uses less digits than its factorization.

11372857421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284591.

The product of its digits is 94080, while the sum is 41.

The spelling of 11372857421 in words is "eleven billion, three hundred seventy-two million, eight hundred fifty-seven thousand, four hundred twenty-one".