1012011200 has 84 divisors (see below), whose sum is σ = 2551081512. Its totient is φ = 394905600.

The previous prime is 1012011197. The next prime is 1012011223. The reversal of 1012011200 is 21102101.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57887 + ... + 73313.

It is an arithmetic number, because the mean of its divisors is an integer number (30370018).

Almost surely, 2^1012011200 is an apocalyptic number.

1012011200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1012011200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1275540756).

1012011200 is an abundant number, since it is smaller than the sum of its proper divisors (1539070312).

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

1012011200 is a wasteful number, since it uses less digits than its factorization.

1012011200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15490 (or 15475 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1012011200 is about 31812.1234751785. The cubic root of 1012011200 is about 1003.9878095693.

Adding to 1012011200 its reverse (21102101), we get a palindrome (1033113301).

Subtracting from 1012011200 its reverse (21102101), we obtain a palindrome (990909099).

The spelling of 1012011200 in words is "one billion, twelve million, eleven thousand, two hundred".