110550123421 has 2 divisors, whose sum is σ = 110550123422. Its totient is φ = 110550123420.

The previous prime is 110550123419. The next prime is 110550123427. The reversal of 110550123421 is 124321055011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97897023225 + 12653100196 = 312885^2 + 112486^2 .

It is a cyclic number.

It is not a de Polignac number, because 110550123421 - 2¹ = 110550123419 is a prime.

Together with 110550123419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110550123427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55275061710 + 55275061711.

It is an arithmetic number, because the mean of its divisors is an integer number (55275061711).

Almost surely, 2^110550123421 is an apocalyptic number.

It is an amenable number.

110550123421 is a deficient number, since it is larger than the sum of its proper divisors (1).

110550123421 is an equidigital number, since it uses as much as digits as its factorization.

110550123421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 110550123421 its reverse (124321055011), we get a palindrome (234871178432).

The spelling of 110550123421 in words is "one hundred ten billion, five hundred fifty million, one hundred twenty-three thousand, four hundred twenty-one".