121220233112 has 64 divisors (see below), whose sum is σ = 255048998400. Its totient is φ = 53539539840.

The previous prime is 121220233109. The next prime is 121220233139. The reversal of 121220233112 is 211332022121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 469478 + ... + 680330.

It is an arithmetic number, because the mean of its divisors is an integer number (3985140600).

Almost surely, 2^121220233112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121220233112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127524499200).

121220233112 is an abundant number, since it is smaller than the sum of its proper divisors (133828765288).

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

121220233112 is a wasteful number, since it uses less digits than its factorization.

121220233112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211056 (or 211052 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 121220233112 its reverse (211332022121), we get a palindrome (332552255233).

The spelling of 121220233112 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred thirty-three thousand, one hundred twelve".