121330111220 has 12 divisors (see below), whose sum is σ = 254793233604. Its totient is φ = 48532044480.

The previous prime is 121330111219. The next prime is 121330111223. The reversal of 121330111220 is 22111033121.

It can be written as a sum of positive squares in 2 ways, for example, as 16720558864 + 104609552356 = 129308^2 + 323434^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121330111223) 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, 3033252761 + ... + 3033252800.

It is an arithmetic number, because the mean of its divisors is an integer number (21232769467).

Almost surely, 2^121330111220 is an apocalyptic number.

121330111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121330111220 is an abundant number, since it is smaller than the sum of its proper divisors (133463122384).

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

121330111220 is a wasteful number, since it uses less digits than its factorization.

121330111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6066505570 (or 6066505568 counting only the distinct ones).

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

Adding to 121330111220 its reverse (22111033121), we get a palindrome (143441144341).

The spelling of 121330111220 in words is "one hundred twenty-one billion, three hundred thirty million, one hundred eleven thousand, two hundred twenty".