1321201144 has 32 divisors (see below), whose sum is σ = 2645089920. Its totient is φ = 617180256.

The previous prime is 1321201139. The next prime is 1321201153. The reversal of 1321201144 is 4411021231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75582 + ... + 91405.

It is an arithmetic number, because the mean of its divisors is an integer number (82659060).

Almost surely, 2^1321201144 is an apocalyptic number.

It is an amenable number.

1321201144 is an abundant number, since it is smaller than the sum of its proper divisors (1323888776).

1321201144 is a wasteful number, since it uses less digits than its factorization.

1321201144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167059 (or 167055 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1321201144 is about 36348.3306906933. The cubic root of 1321201144 is about 1097.2939390326.

Adding to 1321201144 its reverse (4411021231), we get a palindrome (5732222375).

The spelling of 1321201144 in words is "one billion, three hundred twenty-one million, two hundred one thousand, one hundred forty-four".