221112102012012 has 48 divisors (see below), whose sum is σ = 573299827682400. Its totient is φ = 73698090163200.

The previous prime is 221112102011993. The next prime is 221112102012013. The reversal of 221112102012012 is 210210201211122.

221112102012012 is a `hidden beast` number, since 221 + 1 + 1 + 210 + 201 + 20 + 12 = 666.

It is a super-2 number, since 2×221112102012012² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (221112102012013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81207837 + ... + 83886452.

It is an arithmetic number, because the mean of its divisors is an integer number (11943746410050).

Almost surely, 2^{221112102012012} is an apocalyptic number.

It is an amenable number.

221112102012012 is an abundant number, since it is smaller than the sum of its proper divisors (352187725670388).

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

221112102012012 is a wasteful number, since it uses less digits than its factorization.

221112102012012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165106703 (or 165106695 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221112102012012 its reverse (210210201211122), we get a palindrome (431322303223134).

The spelling of 221112102012012 in words is "two hundred twenty-one trillion, one hundred twelve billion, one hundred two million, twelve thousand, twelve".