1212112001 has 4 divisors (see below), whose sum is σ = 1212185904. Its totient is φ = 1212038100.

The previous prime is 1212111977. The next prime is 1212112037. The reversal of 1212112001 is 1002112121.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1212112001 - 2¹⁸ = 1211849857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212112051) 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, 95 + ... + 49236.

It is an arithmetic number, because the mean of its divisors is an integer number (303046476).

Almost surely, 2^1212112001 is an apocalyptic number.

It is an amenable number.

1212112001 is a deficient number, since it is larger than the sum of its proper divisors (73903).

1212112001 is an equidigital number, since it uses as much as digits as its factorization.

1212112001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73902.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1212112001 is about 34815.3989062311. The cubic root of 1212112001 is about 1066.2218634456.

Adding to 1212112001 its reverse (1002112121), we get a palindrome (2214224122).

The spelling of 1212112001 in words is "one billion, two hundred twelve million, one hundred twelve thousand, one".