20100110121989 has 4 divisors (see below), whose sum is σ = 20106094081920. Its totient is φ = 20094126162060.

The previous prime is 20100110121979. The next prime is 20100110122013. The reversal of 20100110121989 is 98912101100102.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 20100110121989 - 2⁴⁴ = 2507924077573 is a prime.

It is a super-2 number, since 2×20100110121989² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100110121919) 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, 2991974927 + ... + 2991981644.

It is an arithmetic number, because the mean of its divisors is an integer number (5026523520480).

Almost surely, 2^{20100110121989} is an apocalyptic number.

It is an amenable number.

20100110121989 is a deficient number, since it is larger than the sum of its proper divisors (5983959931).

20100110121989 is an equidigital number, since it uses as much as digits as its factorization.

20100110121989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5983959930.

The product of its (nonzero) digits is 2592, while the sum is 35.

The spelling of 20100110121989 in words is "twenty trillion, one hundred billion, one hundred ten million, one hundred twenty-one thousand, nine hundred eighty-nine".