1210121120 has 72 divisors (see below), whose sum is σ = 3095813196. Its totient is φ = 446803968.

The previous prime is 1210121117. The next prime is 1210121197. The reversal of 1210121120 is 211210121.

It can be written as a sum of positive squares in 6 ways, for example, as 68492176 + 1141628944 = 8276^2 + 33788^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4664 + ... + 49416.

Almost surely, 2^1210121120 is an apocalyptic number.

1210121120 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 1210121120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1547906598).

1210121120 is an abundant number, since it is smaller than the sum of its proper divisors (1885692076).

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

1210121120 is a wasteful number, since it uses less digits than its factorization.

1210121120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44794 (or 44773 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1210121120 is about 34786.7951958786. The cubic root of 1210121120 is about 1065.6377908814.

Adding to 1210121120 its reverse (211210121), we get a palindrome (1421331241).

The spelling of 1210121120 in words is "one billion, two hundred ten million, one hundred twenty-one thousand, one hundred twenty".