11921575290 has 16 divisors (see below), whose sum is σ = 28611780768. Its totient is φ = 3179086736.

The previous prime is 11921575243. The next prime is 11921575297. The reversal of 11921575290 is 9257512911.

It is not an unprimeable number, because it can be changed into a prime (11921575297) 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, 198692892 + ... + 198692951.

It is an arithmetic number, because the mean of its divisors is an integer number (1788236298).

Almost surely, 2^11921575290 is an apocalyptic number.

11921575290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11921575290 is an abundant number, since it is smaller than the sum of its proper divisors (16690205478).

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

11921575290 is a wasteful number, since it uses less digits than its factorization.

11921575290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397385853.

The product of its (nonzero) digits is 56700, while the sum is 42.

The spelling of 11921575290 in words is "eleven billion, nine hundred twenty-one million, five hundred seventy-five thousand, two hundred ninety".