1011213100 has 18 divisors (see below), whose sum is σ = 2194332644. Its totient is φ = 404485200.

The previous prime is 1011213097. The next prime is 1011213107. The reversal of 1011213100 is 13121101.

1011213100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1011213100² = 2045103867223220000, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (1011213107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5055966 + ... + 5056165.

Almost surely, 2^1011213100 is an apocalyptic number.

1011213100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011213100 is an abundant number, since it is smaller than the sum of its proper divisors (1183119544).

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

1011213100 is a wasteful number, since it uses less digits than its factorization.

1011213100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10112145 (or 10112138 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 1011213100 is about 31799.5770412124. The cubic root of 1011213100 is about 1003.7238159821.

Adding to 1011213100 its reverse (13121101), we get a palindrome (1024334201).

The spelling of 1011213100 in words is "one billion, eleven million, two hundred thirteen thousand, one hundred".