1211132021994 has 24 divisors (see below), whose sum is σ = 2624513593572. Its totient is φ = 403650025920.

The previous prime is 1211132021987. The next prime is 1211132021999. The reversal of 1211132021994 is 4991202311121.

1211132021994 is a `hidden beast` number, since 1 + 2 + 111 + 320 + 219 + 9 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 948409142769 + 262722879225 = 973863^2 + 512565^2 .

It is not an unprimeable number, because it can be changed into a prime (1211132021999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4930779 + ... + 5170574.

Almost surely, 2^{1211132021994} is an apocalyptic number.

1211132021994 is an abundant number, since it is smaller than the sum of its proper divisors (1413381571578).

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

1211132021994 is a wasteful number, since it uses less digits than its factorization.

1211132021994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10108022 (or 10108019 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The spelling of 1211132021994 in words is "one trillion, two hundred eleven billion, one hundred thirty-two million, twenty-one thousand, nine hundred ninety-four".