1201402020400 has 60 divisors (see below), whose sum is σ = 2888939664232. Its totient is φ = 480132702720.

The previous prime is 1201402020391. The next prime is 1201402020437. The reversal of 1201402020400 is 40202041021.

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 888069 + ... + 1786468.

Almost surely, 2^{1201402020400} is an apocalyptic number.

1201402020400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201402020400 is an abundant number, since it is smaller than the sum of its proper divisors (1687537643832).

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

1201402020400 is a wasteful number, since it uses less digits than its factorization.

1201402020400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2675678 (or 2675667 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 1201402020400 its reverse (40202041021), we get a palindrome (1241604061421).

The spelling of 1201402020400 in words is "one trillion, two hundred one billion, four hundred two million, twenty thousand, four hundred".