221211001121112 has 48 divisors (see below), whose sum is σ = 615305374747440. Its totient is φ = 71744108470848.

The previous prime is 221211001121087. The next prime is 221211001121119. The reversal of 221211001121112 is 211121100112122.

It is a happy number.

221211001121112 is a `hidden beast` number, since 221 + 211 + 0 + 0 + 1 + 121 + 112 = 666.

It is a super-2 number, since 2×221211001121112² (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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211001121119) 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, 41518578628 + ... + 41518583955.

It is an arithmetic number, because the mean of its divisors is an integer number (12818861973905).

Almost surely, 2^{221211001121112} is an apocalyptic number.

It is an amenable number.

221211001121112 is an abundant number, since it is smaller than the sum of its proper divisors (394094373626328).

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

221211001121112 is a wasteful number, since it uses less digits than its factorization.

221211001121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83037162632 (or 83037162625 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 221211001121112 its reverse (211121100112122), we get a palindrome (432332101233234).

The spelling of 221211001121112 in words is "two hundred twenty-one trillion, two hundred eleven billion, one million, one hundred twenty-one thousand, one hundred twelve".