20121101023 has 8 divisors (see below), whose sum is σ = 21207953520. Its totient is φ = 19037033280.

The previous prime is 20121100991. The next prime is 20121101027. The reversal of 20121101023 is 32010112102.

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

It is not a de Polignac number, because 20121101023 - 2⁵ = 20121100991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20121100994 and 20121101012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121101027) 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, 681340 + ... + 710257.

It is an arithmetic number, because the mean of its divisors is an integer number (2650994190).

Almost surely, 2^20121101023 is an apocalyptic number.

20121101023 is a deficient number, since it is larger than the sum of its proper divisors (1086852497).

20121101023 is a wasteful number, since it uses less digits than its factorization.

20121101023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392377.

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

Adding to 20121101023 its reverse (32010112102), we get a palindrome (52131213125).

The spelling of 20121101023 in words is "twenty billion, one hundred twenty-one million, one hundred one thousand, twenty-three".