20101123201 has 4 divisors (see below), whose sum is σ = 20110514004. Its totient is φ = 20091732400.

The previous prime is 20101123157. The next prime is 20101123219. The reversal of 20101123201 is 10232110102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12061310976 + 8039812225 = 109824^2 + 89665^2 .

It is a cyclic number.

It is not a de Polignac number, because 20101123201 - 2¹⁵ = 20101090433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20101123001) 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, 4692190 + ... + 4696471.

It is an arithmetic number, because the mean of its divisors is an integer number (5027628501).

Almost surely, 2^20101123201 is an apocalyptic number.

It is an amenable number.

20101123201 is a deficient number, since it is larger than the sum of its proper divisors (9390803).

20101123201 is an equidigital number, since it uses as much as digits as its factorization.

20101123201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9390802.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20101123201 its reverse (10232110102), we get a palindrome (30333233303).

It can be divided in two parts, 2010 and 1123201, that added together give a palindrome (1125211).

The spelling of 20101123201 in words is "twenty billion, one hundred one million, one hundred twenty-three thousand, two hundred one".