20210102111123 has 16 divisors (see below), whose sum is σ = 20629860166656. Its totient is φ = 19794359370240.

The previous prime is 20210102111107. The next prime is 20210102111131. The reversal of 20210102111123 is 32111120101202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20210102111123 - 2⁴ = 20210102111107 is a prime.

It is a super-2 number, since 2×20210102111123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20210102111323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18529463 + ... + 19589823.

It is an arithmetic number, because the mean of its divisors is an integer number (1289366260416).

Almost surely, 2^{20210102111123} is an apocalyptic number.

20210102111123 is a deficient number, since it is larger than the sum of its proper divisors (419758055533).

20210102111123 is a wasteful number, since it uses less digits than its factorization.

20210102111123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062254.

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

Adding to 20210102111123 its reverse (32111120101202), we get a palindrome (52321222212325).

The spelling of 20210102111123 in words is "twenty trillion, two hundred ten billion, one hundred two million, one hundred eleven thousand, one hundred twenty-three".