20102211121123 has 4 divisors (see below), whose sum is σ = 20185622785768. Its totient is φ = 20018799456480.

The previous prime is 20102211121093. The next prime is 20102211121151. The reversal of 20102211121123 is 32112111220102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20102211121123 - 2¹⁷ = 20102210990051 is a prime.

It is a super-2 number, since 2×20102211121123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20102211121123.

It is not an unprimeable number, because it can be changed into a prime (20102211121183) 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, 41705831961 + ... + 41705832442.

It is an arithmetic number, because the mean of its divisors is an integer number (5046405696442).

Almost surely, 2^{20102211121123} is an apocalyptic number.

20102211121123 is a deficient number, since it is larger than the sum of its proper divisors (83411664645).

20102211121123 is an equidigital number, since it uses as much as digits as its factorization.

20102211121123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83411664644.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 20102211121123 its reverse (32112111220102), we get a palindrome (52214322341225).

The spelling of 20102211121123 in words is "twenty trillion, one hundred two billion, two hundred eleven million, one hundred twenty-one thousand, one hundred twenty-three".