121131103220 has 24 divisors (see below), whose sum is σ = 256997746824. Its totient is φ = 47952930816.

The previous prime is 121131103201. The next prime is 121131103253. The reversal of 121131103220 is 22301131121.

It can be written as a sum of positive squares in 4 ways, for example, as 6050039524 + 115081063696 = 77782^2 + 339236^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31217417 + ... + 31221296.

It is an arithmetic number, because the mean of its divisors is an integer number (10708239451).

Almost surely, 2^121131103220 is an apocalyptic number.

121131103220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121131103220 is an abundant number, since it is smaller than the sum of its proper divisors (135866643604).

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

121131103220 is a wasteful number, since it uses less digits than its factorization.

121131103220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62438819 (or 62438817 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 121131103220 its reverse (22301131121), we get a palindrome (143432234341).

The spelling of 121131103220 in words is "one hundred twenty-one billion, one hundred thirty-one million, one hundred three thousand, two hundred twenty".