1231402201 has 4 divisors (see below), whose sum is σ = 1243594404. Its totient is φ = 1219210000.

The previous prime is 1231402199. The next prime is 1231402247. The reversal of 1231402201 is 1022041321.

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 1112155801 + 119246400 = 33349^2 + 10920^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231402201 - 2¹ = 1231402199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231402001) 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, 6095950 + ... + 6096151.

It is an arithmetic number, because the mean of its divisors is an integer number (310898601).

Almost surely, 2^1231402201 is an apocalyptic number.

It is an amenable number.

1231402201 is a deficient number, since it is larger than the sum of its proper divisors (12192203).

1231402201 is a wasteful number, since it uses less digits than its factorization.

1231402201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12192202.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1231402201 is about 35091.3408264774. The cubic root of 1231402201 is about 1071.8482630452.

Adding to 1231402201 its reverse (1022041321), we get a palindrome (2253443522).

The spelling of 1231402201 in words is "one billion, two hundred thirty-one million, four hundred two thousand, two hundred one".