1201919201 has 4 divisors (see below), whose sum is σ = 1373621952. Its totient is φ = 1030216452.

The previous prime is 1201919179. The next prime is 1201919249. The reversal of 1201919201 is 1029191021.

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: 1029191021 = 14249 ⋅72229.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201919201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201919501) 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, 85851365 + ... + 85851378.

It is an arithmetic number, because the mean of its divisors is an integer number (343405488).

Almost surely, 2^1201919201 is an apocalyptic number.

It is an amenable number.

1201919201 is a deficient number, since it is larger than the sum of its proper divisors (171702751).

1201919201 is an equidigital number, since it uses as much as digits as its factorization.

1201919201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171702750.

The product of its (nonzero) digits is 324, while the sum is 26.

The square root of 1201919201 is about 34668.7063646742. The cubic root of 1201919201 is about 1063.2247828206.

The spelling of 1201919201 in words is "one billion, two hundred one million, nine hundred nineteen thousand, two hundred one".