121020120220 has 36 divisors (see below), whose sum is σ = 261196661880. Its totient is φ = 47099711808.

The previous prime is 121020120163. The next prime is 121020120259. The reversal of 121020120220 is 22021020121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121020120220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2182630 + ... + 2237389.

It is an arithmetic number, because the mean of its divisors is an integer number (7255462830).

Almost surely, 2^121020120220 is an apocalyptic number.

121020120220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121020120220 is an abundant number, since it is smaller than the sum of its proper divisors (140176541660).

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

121020120220 is a wasteful number, since it uses less digits than its factorization.

121020120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4420102 (or 4420063 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 121020120220 its reverse (22021020121), we get a palindrome (143041140341).

The spelling of 121020120220 in words is "one hundred twenty-one billion, twenty million, one hundred twenty thousand, two hundred twenty".