1202100400 has 60 divisors (see below), whose sum is σ = 2966138032. Its totient is φ = 467838720.

The previous prime is 1202100391. The next prime is 1202100407. The reversal of 1202100400 is 40012021.

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 (1202100407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25812 + ... + 55411.

Almost surely, 2^1202100400 is an apocalyptic number.

1202100400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1202100400 is an abundant number, since it is smaller than the sum of its proper divisors (1764037632).

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

1202100400 is a wasteful number, since it uses less digits than its factorization.

1202100400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81278 (or 81267 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1202100400 is about 34671.3195595437. The cubic root of 1202100400 is about 1063.2782100356.

Adding to 1202100400 its reverse (40012021), we get a palindrome (1242112421).

The spelling of 1202100400 in words is "one billion, two hundred two million, one hundred thousand, four hundred".