121211120 has 40 divisors (see below), whose sum is σ = 287820864. Its totient is φ = 47451392.

The previous prime is 121211113. The next prime is 121211137. The reversal of 121211120 is 21112121.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×121211120² = 29384271223308800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12359 + ... + 19878.

Almost surely, 2^121211120 is an apocalyptic number.

121211120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121211120 is an abundant number, since it is smaller than the sum of its proper divisors (166609744).

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

121211120 is a wasteful number, since it uses less digits than its factorization.

121211120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32297 (or 32291 counting only the distinct ones).

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

The square root of 121211120 is about 11009.5921813662. The cubic root of 121211120 is about 494.8962405381.

Adding to 121211120 its reverse (21112121), we get a palindrome (142323241).

The spelling of 121211120 in words is "one hundred twenty-one million, two hundred eleven thousand, one hundred twenty".