20210311123 has 2 divisors, whose sum is σ = 20210311124. Its totient is φ = 20210311122.

The previous prime is 20210311087. The next prime is 20210311159. The reversal of 20210311123 is 32111301202.

It is a balanced prime because it is at equal distance from previous prime (20210311087) and next prime (20210311159).

It is a cyclic number.

It is not a de Polignac number, because 20210311123 - 2²⁹ = 19673440211 is a prime.

It is a super-2 number, since 2×20210311123² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20210311097 and 20210311106.

It is not a weakly prime, because it can be changed into another prime (20210311183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105155561 + 10105155562.

It is an arithmetic number, because the mean of its divisors is an integer number (10105155562).

Almost surely, 2^20210311123 is an apocalyptic number.

20210311123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210311123 is an equidigital number, since it uses as much as digits as its factorization.

20210311123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20210311123 its reverse (32111301202), we get a palindrome (52321612325).

The spelling of 20210311123 in words is "twenty billion, two hundred ten million, three hundred eleven thousand, one hundred twenty-three".