121031220 has 24 divisors (see below), whose sum is σ = 338887584. Its totient is φ = 32274976.

The previous prime is 121031219. The next prime is 121031233. The reversal of 121031220 is 22130121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121031196 and 121031205.

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, 1008534 + ... + 1008653.

It is an arithmetic number, because the mean of its divisors is an integer number (14120316).

Almost surely, 2^121031220 is an apocalyptic number.

121031220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121031220 is an abundant number, since it is smaller than the sum of its proper divisors (217856364).

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

121031220 is a wasteful number, since it uses less digits than its factorization.

121031220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2017199 (or 2017197 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 121031220 is about 11001.4189993837. The cubic root of 121031220 is about 494.6512797439.

Adding to 121031220 its reverse (22130121), we get a palindrome (143161341).

The spelling of 121031220 in words is "one hundred twenty-one million, thirty-one thousand, two hundred twenty".