11211910000 has 50 divisors (see below), whose sum is σ = 27145179512. Its totient is φ = 4484760000.

The previous prime is 11211909991. The next prime is 11211910001. The reversal of 11211910000 is 1911211.

It is a tau number, because it is divible by the number of its divisors (50).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211910001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 550596 + ... + 570595.

Almost surely, 2^11211910000 is an apocalyptic number.

11211910000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211910000 is an abundant number, since it is smaller than the sum of its proper divisors (15933269512).

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

11211910000 is an equidigital number, since it uses as much as digits as its factorization.

11211910000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121219 (or 1121198 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 16.

The spelling of 11211910000 in words is "eleven billion, two hundred eleven million, nine hundred ten thousand".