20101001123 has 8 divisors (see below), whose sum is σ = 22988888160. Its totient is φ = 17217192960.

The previous prime is 20101001119. The next prime is 20101001131. The reversal of 20101001123 is 32110010102.

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 20101001123 - 2² = 20101001119 is a prime.

It is a super-2 number, since 2×20101001123² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20101001423) 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, 1009148 + ... + 1028873.

It is an arithmetic number, because the mean of its divisors is an integer number (2873611020).

Almost surely, 2^20101001123 is an apocalyptic number.

20101001123 is a deficient number, since it is larger than the sum of its proper divisors (2887887037).

20101001123 is a wasteful number, since it uses less digits than its factorization.

20101001123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2039437.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20101001123 its reverse (32110010102), we get a palindrome (52211011225).

The spelling of 20101001123 in words is "twenty billion, one hundred one million, one thousand, one hundred twenty-three".