121003021220 has 12 divisors (see below), whose sum is σ = 254106344604. Its totient is φ = 48401208480.

The previous prime is 121003021213. The next prime is 121003021231. The reversal of 121003021220 is 22120300121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 89727806116 + 31275215104 = 299546^2 + 176848^2 .

It is a super-2 number, since 2×121003021220² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121003021195 and 121003021204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3025075511 + ... + 3025075550.

It is an arithmetic number, because the mean of its divisors is an integer number (21175528717).

Almost surely, 2^121003021220 is an apocalyptic number.

121003021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121003021220 is an abundant number, since it is smaller than the sum of its proper divisors (133103323384).

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

121003021220 is a wasteful number, since it uses less digits than its factorization.

121003021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6050151070 (or 6050151068 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 121003021220 its reverse (22120300121), we get a palindrome (143123321341).

The spelling of 121003021220 in words is "one hundred twenty-one billion, three million, twenty-one thousand, two hundred twenty".