20213112123103 has 2 divisors, whose sum is σ = 20213112123104. Its totient is φ = 20213112123102.

The previous prime is 20213112123097. The next prime is 20213112123119. The reversal of 20213112123103 is 30132121131202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20213112123103 - 2²⁵ = 20213078568671 is a prime.

It is a super-2 number, since 2×20213112123103² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20213112123403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106556061551 + 10106556061552.

It is an arithmetic number, because the mean of its divisors is an integer number (10106556061552).

Almost surely, 2^{20213112123103} is an apocalyptic number.

20213112123103 is a deficient number, since it is larger than the sum of its proper divisors (1).

20213112123103 is an equidigital number, since it uses as much as digits as its factorization.

20213112123103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 20213112123103 its reverse (30132121131202), we get a palindrome (50345233254305).

It can be divided in two parts, 2021311 and 2123103, that added together give a palindrome (4144414).

The spelling of 20213112123103 in words is "twenty trillion, two hundred thirteen billion, one hundred twelve million, one hundred twenty-three thousand, one hundred three".