1212162001 has 4 divisors (see below), whose sum is σ = 1212599104. Its totient is φ = 1211724900.

The previous prime is 1212161947. The next prime is 1212162037. The reversal of 1212162001 is 1002612121.

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 a de Polignac number, because none of the positive numbers 2^k-1212162001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210162001) 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, 214365 + ... + 219946.

It is an arithmetic number, because the mean of its divisors is an integer number (303149776).

Almost surely, 2^1212162001 is an apocalyptic number.

It is an amenable number.

1212162001 is a deficient number, since it is larger than the sum of its proper divisors (437103).

1212162001 is an equidigital number, since it uses as much as digits as its factorization.

1212162001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437102.

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

The square root of 1212162001 is about 34816.1169718853. The cubic root of 1212162001 is about 1066.2365239060.

Adding to 1212162001 its reverse (1002612121), we get a palindrome (2214774122).

The spelling of 1212162001 in words is "one billion, two hundred twelve million, one hundred sixty-two thousand, one".