121012120021220 has 24 divisors (see below), whose sum is σ = 254333240691264. Its totient is φ = 48365269218656.

The previous prime is 121012120021183. The next prime is 121012120021271. The reversal of 121012120021220 is 22120021210121.

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, 2473649294 + ... + 2473698213.

It is an arithmetic number, because the mean of its divisors is an integer number (10597218362136).

Almost surely, 2^{121012120021220} is an apocalyptic number.

121012120021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121012120021220 is an abundant number, since it is smaller than the sum of its proper divisors (133321120670044).

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

121012120021220 is a wasteful number, since it uses less digits than its factorization.

121012120021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4947348739 (or 4947348737 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121012120021220 its reverse (22120021210121), we get a palindrome (143132141231341).

The spelling of 121012120021220 in words is "one hundred twenty-one trillion, twelve billion, one hundred twenty million, twenty-one thousand, two hundred twenty".