2201721123 has 8 divisors (see below), whose sum is σ = 3355003648. Its totient is φ = 1258126344.

The previous prime is 2201721107. The next prime is 2201721139. The reversal of 2201721123 is 3211271022.

It is an interprime number because it is at equal distance from previous prime (2201721107) and next prime (2201721139).

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

It is not a de Polignac number, because 2201721123 - 2⁴ = 2201721107 is a prime.

It is a super-2 number, since 2×2201721123² = 9695151806928762258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 104843863 = 2201721123 / (2 + 2 + 0 + 1 + 7 + 2 + 1 + 1 + 2 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2201721123.

It is not an unprimeable number, because it can be changed into a prime (2201721143) 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, 52421911 + ... + 52421952.

It is an arithmetic number, because the mean of its divisors is an integer number (419375456).

Almost surely, 2^2201721123 is an apocalyptic number.

2201721123 is a deficient number, since it is larger than the sum of its proper divisors (1153282525).

2201721123 is a wasteful number, since it uses less digits than its factorization.

2201721123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104843873.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 2201721123 is about 46922.5012440727. The cubic root of 2201721123 is about 1300.9305217551.

Adding to 2201721123 its reverse (3211271022), we get a palindrome (5412992145).

The spelling of 2201721123 in words is "two billion, two hundred one million, seven hundred twenty-one thousand, one hundred twenty-three".