11553722421 has 8 divisors (see below), whose sum is σ = 15406235040. Its totient is φ = 7701845712.

The previous prime is 11553722419. The next prime is 11553722423. The reversal of 11553722421 is 12422735511.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11553722419) and next prime (11553722423).

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

It is not a de Polignac number, because 11553722421 - 2¹ = 11553722419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11553722423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114831 + ... + 190508.

It is an arithmetic number, because the mean of its divisors is an integer number (1925779380).

Almost surely, 2^11553722421 is an apocalyptic number.

It is an amenable number.

11553722421 is a deficient number, since it is larger than the sum of its proper divisors (3852512619).

11553722421 is a wasteful number, since it uses less digits than its factorization.

11553722421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317955.

The product of its digits is 16800, while the sum is 33.

The spelling of 11553722421 in words is "eleven billion, five hundred fifty-three million, seven hundred twenty-two thousand, four hundred twenty-one".