11231378052 has 48 divisors (see below), whose sum is σ = 26355044352. Its totient is φ = 3722620320.

The previous prime is 11231378003. The next prime is 11231378057. The reversal of 11231378052 is 25087313211.

It is a happy number.

It is a super-2 number, since 2×11231378052² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11231378057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2917593 + ... + 2921439.

It is an arithmetic number, because the mean of its divisors is an integer number (549063424).

Almost surely, 2^11231378052 is an apocalyptic number.

11231378052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11231378052 is an abundant number, since it is smaller than the sum of its proper divisors (15123666300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11231378052 is a wasteful number, since it uses less digits than its factorization.

11231378052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5168 (or 5166 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The spelling of 11231378052 in words is "eleven billion, two hundred thirty-one million, three hundred seventy-eight thousand, fifty-two".