1211102221188 has 24 divisors (see below), whose sum is σ = 2825948942208. Its totient is φ = 403694489056.

The previous prime is 1211102221187. The next prime is 1211102221213. The reversal of 1211102221188 is 8811222011121.

It is a super-2 number, since 2×1211102221188² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211102221181) 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, 62245 + ... + 1557587.

It is an arithmetic number, because the mean of its divisors is an integer number (117747872592).

Almost surely, 2^{1211102221188} is an apocalyptic number.

It is an amenable number.

1211102221188 is an abundant number, since it is smaller than the sum of its proper divisors (1614846721020).

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

1211102221188 is a wasteful number, since it uses less digits than its factorization.

1211102221188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562843 (or 1562841 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 30.

The spelling of 1211102221188 in words is "one trillion, two hundred eleven billion, one hundred two million, two hundred twenty-one thousand, one hundred eighty-eight".