1011156221112 has 32 divisors (see below), whose sum is σ = 2540722496400. Its totient is φ = 335341147904.

The previous prime is 1011156221081. The next prime is 1011156221113. The reversal of 1011156221112 is 2111226511101.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011156221113) 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, 106928037 + ... + 106937492.

Almost surely, 2^{1011156221112} is an apocalyptic number.

1011156221112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1011156221112 is an abundant number, since it is smaller than the sum of its proper divisors (1529566275288).

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

1011156221112 is a wasteful number, since it uses less digits than its factorization.

1011156221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213865735 (or 213865731 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 24.

The spelling of 1011156221112 in words is "one trillion, eleven billion, one hundred fifty-six million, two hundred twenty-one thousand, one hundred twelve".