1211201120 has 24 divisors (see below), whose sum is σ = 2861463024. Its totient is φ = 484480384.

The previous prime is 1211201107. The next prime is 1211201207. The reversal of 1211201120 is 211021121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3784844 + ... + 3785163.

It is an arithmetic number, because the mean of its divisors is an integer number (119227626).

Almost surely, 2^1211201120 is an apocalyptic number.

1211201120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211201120 is an abundant number, since it is smaller than the sum of its proper divisors (1650261904).

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

1211201120 is an equidigital number, since it uses as much as digits as its factorization.

1211201120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7570022 (or 7570014 counting only the distinct ones).

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

The square root of 1211201120 is about 34802.3148655373. The cubic root of 1211201120 is about 1065.9547141452.

Adding to 1211201120 its reverse (211021121), we get a palindrome (1422222241).

The spelling of 1211201120 in words is "one billion, two hundred eleven million, two hundred one thousand, one hundred twenty".