1243020100400 has 60 divisors (see below), whose sum is σ = 3216075480912. Its totient is φ = 458961265920.

The previous prime is 1243020100331. The next prime is 1243020100451. The reversal of 1243020100400 is 40010203421.

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, 119515964 + ... + 119526363.

Almost surely, 2^{1243020100400} is an apocalyptic number.

1243020100400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243020100400 is an abundant number, since it is smaller than the sum of its proper divisors (1973055380512).

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

1243020100400 is a wasteful number, since it uses less digits than its factorization.

1243020100400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239042358 (or 239042347 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 1243020100400 its reverse (40010203421), we get a palindrome (1283030303821).

The spelling of 1243020100400 in words is "one trillion, two hundred forty-three billion, twenty million, one hundred thousand, four hundred".