20011101122123 has 8 divisors (see below), whose sum is σ = 21443504534928. Its totient is φ = 18607062133504.

The previous prime is 20011101122119. The next prime is 20011101122183. The reversal of 20011101122123 is 32122110111002.

It is a happy number.

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

It is not a de Polignac number, because 20011101122123 - 2² = 20011101122119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20011101122183) 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, 7091104586 + ... + 7091107407.

It is an arithmetic number, because the mean of its divisors is an integer number (2680438066866).

Almost surely, 2^{20011101122123} is an apocalyptic number.

20011101122123 is a deficient number, since it is larger than the sum of its proper divisors (1432403412805).

20011101122123 is a wasteful number, since it uses less digits than its factorization.

20011101122123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14182212093.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 20011101122123 its reverse (32122110111002), we get a palindrome (52133211233125).

The spelling of 20011101122123 in words is "twenty trillion, eleven billion, one hundred one million, one hundred twenty-two thousand, one hundred twenty-three".