2191050921150 has 432 divisors, whose sum is σ = 7295848151904. Its totient is φ = 461592069120.

The previous prime is 2191050921139. The next prime is 2191050921187. The reversal of 2191050921150 is 511290501912.

2191050921150 is a `hidden beast` number, since 2 + 1 + 91 + 0 + 509 + 2 + 11 + 50 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 402986232 + ... + 402991668.

Almost surely, 2^{2191050921150} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2191050921150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3647924075952).

2191050921150 is an abundant number, since it is smaller than the sum of its proper divisors (5104797230754).

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

2191050921150 is a wasteful number, since it uses less digits than its factorization.

2191050921150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6245 (or 6224 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 36.

The spelling of 2191050921150 in words is "two trillion, one hundred ninety-one billion, fifty million, nine hundred twenty-one thousand, one hundred fifty".