1321200151 has 4 divisors (see below), whose sum is σ = 1321387704. Its totient is φ = 1321012600.

The previous prime is 1321200149. The next prime is 1321200161. The reversal of 1321200151 is 1510021231.

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

It is a cyclic number.

It is not a de Polignac number, because 1321200151 - 2¹ = 1321200149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321200121) 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, 82780 + ... + 97441.

It is an arithmetic number, because the mean of its divisors is an integer number (330346926).

Almost surely, 2^1321200151 is an apocalyptic number.

1321200151 is a deficient number, since it is larger than the sum of its proper divisors (187553).

1321200151 is an equidigital number, since it uses as much as digits as its factorization.

1321200151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187552.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1321200151 is about 36348.3170311914. The cubic root of 1321200151 is about 1097.2936641279.

Adding to 1321200151 its reverse (1510021231), we get a palindrome (2831221382).

The spelling of 1321200151 in words is "one billion, three hundred twenty-one million, two hundred thousand, one hundred fifty-one".