1211113245888 has 224 divisors, whose sum is σ = 4382091230720. Its totient is φ = 319414440960.

The previous prime is 1211113245887. The next prime is 1211113245959. The reversal of 1211113245888 is 8885423111121.

1211113245888 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 113 + 2 + 458 + 88 = 666.

It is a tau number, because it is divible by the number of its divisors (224).

It is not an unprimeable number, because it can be changed into a prime (1211113245887) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3693718 + ... + 4008213.

It is an arithmetic number, because the mean of its divisors is an integer number (19562907280).

Almost surely, 2^{1211113245888} is an apocalyptic number.

1211113245888 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1211113245888 is an abundant number, since it is smaller than the sum of its proper divisors (3170977984832).

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

1211113245888 is a wasteful number, since it uses less digits than its factorization.

1211113245888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7701972 (or 7701956 counting only the distinct ones).

The product of its digits is 122880, while the sum is 45.

The spelling of 1211113245888 in words is "one trillion, two hundred eleven billion, one hundred thirteen million, two hundred forty-five thousand, eight hundred eighty-eight".