20112012102123 has 48 divisors (see below), whose sum is σ = 31449836096640. Its totient is φ = 12336719044608.

The previous prime is 20112012102107. The next prime is 20112012102137. The reversal of 20112012102123 is 32120121021102.

It is not a de Polignac number, because 20112012102123 - 2⁴ = 20112012102107 is a prime.

It is a super-2 number, since 2×20112012102123² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20112012102096 and 20112012102105.

It is not an unprimeable number, because it can be changed into a prime (20112012102103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4711963 + ... + 7901051.

It is an arithmetic number, because the mean of its divisors is an integer number (655204918680).

Almost surely, 2^{20112012102123} is an apocalyptic number.

20112012102123 is a deficient number, since it is larger than the sum of its proper divisors (11337823994517).

20112012102123 is a wasteful number, since it uses less digits than its factorization.

20112012102123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3190036 (or 3190033 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 20112012102123 its reverse (32120121021102), we get a palindrome (52232133123225).

The spelling of 20112012102123 in words is "twenty trillion, one hundred twelve billion, twelve million, one hundred two thousand, one hundred twenty-three".