121220221012 has 48 divisors (see below), whose sum is σ = 245079777600. Its totient is φ = 51849100800.

The previous prime is 121220220991. The next prime is 121220221021. The reversal of 121220221012 is 210122022121.

It is a happy number.

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, 5060239 + ... + 5084137.

It is an arithmetic number, because the mean of its divisors is an integer number (5105828700).

Almost surely, 2^121220221012 is an apocalyptic number.

It is an amenable number.

121220221012 is an abundant number, since it is smaller than the sum of its proper divisors (123859556588).

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

121220221012 is a wasteful number, since it uses less digits than its factorization.

121220221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30712 (or 30710 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121220221012 its reverse (210122022121), we get a palindrome (331342243133).

The spelling of 121220221012 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred twenty-one thousand, twelve".