121102220 has 48 divisors (see below), whose sum is σ = 273883680. Its totient is φ = 44811264.

The previous prime is 121102171. The next prime is 121102243. The reversal of 121102220 is 22201121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17042 + ... + 23078.

It is an arithmetic number, because the mean of its divisors is an integer number (5705910).

Almost surely, 2^121102220 is an apocalyptic number.

121102220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121102220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136941840).

121102220 is an abundant number, since it is smaller than the sum of its proper divisors (152781460).

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

121102220 is a wasteful number, since it uses less digits than its factorization.

121102220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6122 (or 6120 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 121102220 is about 11004.6453827463. The cubic root of 121102220 is about 494.7479858545.

Adding to 121102220 its reverse (22201121), we get a palindrome (143303341).

The spelling of 121102220 in words is "one hundred twenty-one million, one hundred two thousand, two hundred twenty".