221211120112 has 20 divisors (see below), whose sum is σ = 429118612776. Its totient is φ = 110470832960.

The previous prime is 221211120083. The next prime is 221211120113. The reversal of 221211120112 is 211021112122.

It is a super-2 number, since 2×221211120112² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211120113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8406898 + ... + 8433169.

Almost surely, 2^221211120112 is an apocalyptic number.

It is an amenable number.

221211120112 is a deficient number, since it is larger than the sum of its proper divisors (207907492664).

221211120112 is a wasteful number, since it uses less digits than its factorization.

221211120112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16840896 (or 16840890 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221211120112 its reverse (211021112122), we get a palindrome (432232232234).

The spelling of 221211120112 in words is "two hundred twenty-one billion, two hundred eleven million, one hundred twenty thousand, one hundred twelve".