1221120232212 has 12 divisors (see below), whose sum is σ = 2849280541856. Its totient is φ = 407040077400.

The previous prime is 1221120232187. The next prime is 1221120232217. The reversal of 1221120232212 is 2122320211221.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1221120232212² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221120232217) 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, 50880009664 + ... + 50880009687.

Almost surely, 2^{1221120232212} is an apocalyptic number.

1221120232212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1221120232212 is an abundant number, since it is smaller than the sum of its proper divisors (1628160309644).

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

1221120232212 is a wasteful number, since it uses less digits than its factorization.

1221120232212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101760019358 (or 101760019356 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1221120232212 its reverse (2122320211221), we get a palindrome (3343440443433).

The spelling of 1221120232212 in words is "one trillion, two hundred twenty-one billion, one hundred twenty million, two hundred thirty-two thousand, two hundred twelve".