1012120001 has 4 divisors (see below), whose sum is σ = 1014132672. Its totient is φ = 1010107332.

The previous prime is 1012119967. The next prime is 1012120003. The reversal of 1012120001 is 1000212101.

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 an emirpimes, since its reverse is a distinct semiprime: 1000212101 = 7 ⋅142887443.

It is a cyclic number.

It is not a de Polignac number, because 1012120001 - 2¹⁰ = 1012118977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1012120003) 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, 1005581 + ... + 1006586.

It is an arithmetic number, because the mean of its divisors is an integer number (253533168).

Almost surely, 2^1012120001 is an apocalyptic number.

It is an amenable number.

1012120001 is a deficient number, since it is larger than the sum of its proper divisors (2012671).

1012120001 is an equidigital number, since it uses as much as digits as its factorization.

1012120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012670.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1012120001 is about 31813.8334848223. The cubic root of 1012120001 is about 1004.0237877493.

Adding to 1012120001 its reverse (1000212101), we get a palindrome (2012332102).

The spelling of 1012120001 in words is "one billion, twelve million, one hundred twenty thousand, one".