1200321021401 has 4 divisors (see below), whose sum is σ = 1200323242404. Its totient is φ = 1200318800400.

The previous prime is 1200321021379. The next prime is 1200321021407. The reversal of 1200321021401 is 1041201230021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 540041265625 + 660279755776 = 734875^2 + 812576^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200321021401 - 2⁶ = 1200321021337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200321021401.

It is not an unprimeable number, because it can be changed into a prime (1200321021407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283211 + ... + 1575071.

It is an arithmetic number, because the mean of its divisors is an integer number (300080810601).

Almost surely, 2^{1200321021401} is an apocalyptic number.

It is an amenable number.

1200321021401 is a deficient number, since it is larger than the sum of its proper divisors (2221003).

1200321021401 is an equidigital number, since it uses as much as digits as its factorization.

1200321021401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221002.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1200321021401 its reverse (1041201230021), we get a palindrome (2241522251422).

The spelling of 1200321021401 in words is "one trillion, two hundred billion, three hundred twenty-one million, twenty-one thousand, four hundred one".