1200023100 has 90 divisors (see below), whose sum is σ = 3890027064. Its totient is φ = 320004000.

The previous prime is 1200023093. The next prime is 1200023119. The reversal of 1200023100 is 13200021.

It is a happy number.

1200023100 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (90).

It is a super-2 number, since 2×1200023100² = 2880110881067220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

1200023100 is a modest number, since divided by 23100 gives 1200 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 65976 + ... + 82175.

Almost surely, 2^1200023100 is an apocalyptic number.

1200023100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200023100 is an abundant number, since it is smaller than the sum of its proper divisors (2690003964).

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

1200023100 is a wasteful number, since it uses less digits than its factorization.

1200023100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148177 (or 148161 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1200023100 is about 34641.3495695534. The cubic root of 1200023100 is about 1062.6653878647.

Adding to 1200023100 its reverse (13200021), we get a palindrome (1213223121).

The spelling of 1200023100 in words is "one billion, two hundred million, twenty-three thousand, one hundred".