1011211120120 has 32 divisors (see below), whose sum is σ = 2289716913600. Its totient is φ = 401908111488.

The previous prime is 1011211120109. The next prime is 1011211120123. The reversal of 1011211120120 is 210211121101.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1011211120120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011211120123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80504160 + ... + 80516719.

It is an arithmetic number, because the mean of its divisors is an integer number (71553653550).

Almost surely, 2^{1011211120120} is an apocalyptic number.

1011211120120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011211120120 is an abundant number, since it is smaller than the sum of its proper divisors (1278505793480).

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

1011211120120 is a wasteful number, since it uses less digits than its factorization.

1011211120120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161021047 (or 161021043 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1011211120120 its reverse (210211121101), we get a palindrome (1221422241221).

The spelling of 1011211120120 in words is "one trillion, eleven billion, two hundred eleven million, one hundred twenty thousand, one hundred twenty".