123421013011 has 2 divisors, whose sum is σ = 123421013012. Its totient is φ = 123421013010.

The previous prime is 123421012997. The next prime is 123421013071. The reversal of 123421013011 is 110310124321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123421013011 - 2³³ = 114831078419 is a prime.

It is a super-2 number, since 2×123421013011² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123421013011.

It is not a weakly prime, because it can be changed into another prime (123421013071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61710506505 + 61710506506.

It is an arithmetic number, because the mean of its divisors is an integer number (61710506506).

Almost surely, 2^123421013011 is an apocalyptic number.

123421013011 is a deficient number, since it is larger than the sum of its proper divisors (1).

123421013011 is an equidigital number, since it uses as much as digits as its factorization.

123421013011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 123421013011 its reverse (110310124321), we get a palindrome (233731137332).

The spelling of 123421013011 in words is "one hundred twenty-three billion, four hundred twenty-one million, thirteen thousand, eleven".