1201722101 has 8 divisors (see below), whose sum is σ = 1262390400. Its totient is φ = 1141755472.

The previous prime is 1201722047. The next prime is 1201722103. The reversal of 1201722101 is 1012271021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1201722101 - 2²² = 1197527797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1201722101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201722103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171905 + ... + 178758.

It is an arithmetic number, because the mean of its divisors is an integer number (157798800).

Almost surely, 2^1201722101 is an apocalyptic number.

It is an amenable number.

1201722101 is a deficient number, since it is larger than the sum of its proper divisors (60668299).

1201722101 is a wasteful number, since it uses less digits than its factorization.

1201722101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350835.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 1201722101 is about 34665.8636269169. The cubic root of 1201722101 is about 1063.1666610376.

Adding to 1201722101 its reverse (1012271021), we get a palindrome (2213993122).

The spelling of 1201722101 in words is "one billion, two hundred one million, seven hundred twenty-two thousand, one hundred one".