1121210065 has 16 divisors (see below), whose sum is σ = 1363723200. Its totient is φ = 884820672.

The previous prime is 1121210053. The next prime is 1121210081. The reversal of 1121210065 is 5600121211.

It is a cyclic number.

It is not a de Polignac number, because 1121210065 - 2²¹ = 1119112913 is a prime.

It is a super-2 number, since 2×1121210065² = 2514224019714608450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342406 + ... + 345664.

It is an arithmetic number, because the mean of its divisors is an integer number (85232700).

Almost surely, 2^1121210065 is an apocalyptic number.

It is an amenable number.

1121210065 is a deficient number, since it is larger than the sum of its proper divisors (242513135).

1121210065 is an equidigital number, since it uses as much as digits as its factorization.

1121210065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4176.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 1121210065 is about 33484.4749846851. The cubic root of 1121210065 is about 1038.8726890542.

Adding to 1121210065 its reverse (5600121211), we get a palindrome (6721331276).

The spelling of 1121210065 in words is "one billion, one hundred twenty-one million, two hundred ten thousand, sixty-five".