211421430311123 has 2 divisors, whose sum is σ = 211421430311124. Its totient is φ = 211421430311122.

The previous prime is 211421430311101. The next prime is 211421430311149. The reversal of 211421430311123 is 321113034124112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211421430311123 - 2³⁶ = 211352710834387 is a prime.

It is a super-2 number, since 2×211421430311123² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211421436311123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105710715155561 + 105710715155562.

It is an arithmetic number, because the mean of its divisors is an integer number (105710715155562).

Almost surely, 2^{211421430311123} is an apocalyptic number.

211421430311123 is a deficient number, since it is larger than the sum of its proper divisors (1).

211421430311123 is an equidigital number, since it uses as much as digits as its factorization.

211421430311123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 211421430311123 its reverse (321113034124112), we get a palindrome (532534464435235).

The spelling of 211421430311123 in words is "two hundred eleven trillion, four hundred twenty-one billion, four hundred thirty million, three hundred eleven thousand, one hundred twenty-three".