1011213120 has 56 divisors (see below), whose sum is σ = 3210604704. Its totient is φ = 269656576.

The previous prime is 1011213113. The next prime is 1011213121. The reversal of 1011213120 is 213121101.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1011213096 and 1011213105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011213121) by changing a digit.

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, 525714 + ... + 527633.

Almost surely, 2^1011213120 is an apocalyptic number.

1011213120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011213120 is an abundant number, since it is smaller than the sum of its proper divisors (2199391584).

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

1011213120 is a wasteful number, since it uses less digits than its factorization.

1011213120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053367 (or 1053357 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1011213120 is about 31799.5773556819. The cubic root of 1011213120 is about 1003.7238225993.

Adding to 1011213120 its reverse (213121101), we get a palindrome (1224334221).

It can be divided in two parts, 10112 and 13120, that added together give a palindrome (23232).

The spelling of 1011213120 in words is "one billion, eleven million, two hundred thirteen thousand, one hundred twenty".