1121431201 has 4 divisors (see below), whose sum is σ = 1223379504. Its totient is φ = 1019482900.

The previous prime is 1121431151. The next prime is 1121431229. The reversal of 1121431201 is 1021341211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1121431201 - 2¹⁷ = 1121300129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121431001) 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, 50974135 + ... + 50974156.

It is an arithmetic number, because the mean of its divisors is an integer number (305844876).

Almost surely, 2^1121431201 is an apocalyptic number.

1121431201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1121431201 is a deficient number, since it is larger than the sum of its proper divisors (101948303).

1121431201 is a wasteful number, since it uses less digits than its factorization.

1121431201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101948302.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1121431201 is about 33487.7768894861. The cubic root of 1121431201 is about 1038.9409834374.

Adding to 1121431201 its reverse (1021341211), we get a palindrome (2142772412).

The spelling of 1121431201 in words is "one billion, one hundred twenty-one million, four hundred thirty-one thousand, two hundred one".