121220310 has 16 divisors (see below), whose sum is σ = 290928816. Its totient is φ = 32325408.

The previous prime is 121220303. The next prime is 121220321. The reversal of 121220310 is 13022121.

It is a super-2 number, since 2×121220310² = 29388727112992200, which contains 22 as substring.

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, 2020309 + ... + 2020368.

It is an arithmetic number, because the mean of its divisors is an integer number (18183051).

Almost surely, 2^121220310 is an apocalyptic number.

121220310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121220310 is an abundant number, since it is smaller than the sum of its proper divisors (169708506).

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

121220310 is a wasteful number, since it uses less digits than its factorization.

121220310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4040687.

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

The square root of 121220310 is about 11010.0095367806. The cubic root of 121220310 is about 494.9087475906.

Adding to 121220310 its reverse (13022121), we get a palindrome (134242431).

The spelling of 121220310 in words is "one hundred twenty-one million, two hundred twenty thousand, three hundred ten".