1211101120 has 28 divisors (see below), whose sum is σ = 2883935304. Its totient is φ = 484440320.

The previous prime is 1211101093. The next prime is 1211101139. The reversal of 1211101120 is 211011121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1211101097 and 1211101106.

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, 1892026 + ... + 1892665.

Almost surely, 2^1211101120 is an apocalyptic number.

1211101120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211101120 is an abundant number, since it is smaller than the sum of its proper divisors (1672834184).

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

1211101120 is an equidigital number, since it uses as much as digits as its factorization.

1211101120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3784708 (or 3784698 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1211101120 is about 34800.8781498398. The cubic root of 1211101120 is about 1065.9253773149.

Adding to 1211101120 its reverse (211011121), we get a palindrome (1422112241).

The spelling of 1211101120 in words is "one billion, two hundred eleven million, one hundred one thousand, one hundred twenty".