1211104120 has 16 divisors (see below), whose sum is σ = 2724984360. Its totient is φ = 484441632.

The previous prime is 1211104093. The next prime is 1211104121. The reversal of 1211104120 is 214011121.

It is a self number, because there is not a number n which added to its sum of digits gives 1211104120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211104121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15138762 + ... + 15138841.

Almost surely, 2^1211104120 is an apocalyptic number.

1211104120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211104120 is an abundant number, since it is smaller than the sum of its proper divisors (1513880240).

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

1211104120 is a wasteful number, since it uses less digits than its factorization.

1211104120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30277614 (or 30277610 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1211104120 is about 34800.9212521738. The cubic root of 1211104120 is about 1065.9262574433.

Adding to 1211104120 its reverse (214011121), we get a palindrome (1425115241).

The spelling of 1211104120 in words is "one billion, two hundred eleven million, one hundred four thousand, one hundred twenty".