1201320281 has 4 divisors (see below), whose sum is σ = 1372937472. Its totient is φ = 1029703092.

The previous prime is 1201320259. The next prime is 1201320287. The reversal of 1201320281 is 1820231021.

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 1201320281 - 2¹⁰ = 1201319257 is a prime.

It is a super-2 number, since 2×1201320281² = 2886340835083837922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201320287) 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, 85808585 + ... + 85808598.

It is an arithmetic number, because the mean of its divisors is an integer number (343234368).

Almost surely, 2^1201320281 is an apocalyptic number.

It is an amenable number.

1201320281 is a deficient number, since it is larger than the sum of its proper divisors (171617191).

1201320281 is an equidigital number, since it uses as much as digits as its factorization.

1201320281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171617190.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1201320281 is about 34660.0675273433. The cubic root of 1201320281 is about 1063.0481507623.

The spelling of 1201320281 in words is "one billion, two hundred one million, three hundred twenty thousand, two hundred eighty-one".