1912120201 has 4 divisors (see below), whose sum is σ = 1912374400. Its totient is φ = 1911866004.

The previous prime is 1912120193. The next prime is 1912120229. The reversal of 1912120201 is 1020212191.

It is a happy number.

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 1912120201 - 2³ = 1912120193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1912120261) 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, 115461 + ... + 130978.

It is an arithmetic number, because the mean of its divisors is an integer number (478093600).

Almost surely, 2^1912120201 is an apocalyptic number.

It is an amenable number.

1912120201 is a deficient number, since it is larger than the sum of its proper divisors (254199).

1912120201 is an equidigital number, since it uses as much as digits as its factorization.

1912120201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254198.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 1912120201 is about 43727.7966629923. The cubic root of 1912120201 is about 1241.1903677084.

Adding to 1912120201 its reverse (1020212191), we get a palindrome (2932332392).

The spelling of 1912120201 in words is "one billion, nine hundred twelve million, one hundred twenty thousand, two hundred one".