10011221123 has 2 divisors, whose sum is σ = 10011221124. Its totient is φ = 10011221122.

The previous prime is 10011221083. The next prime is 10011221131. The reversal of 10011221123 is 32112211001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10011221123 - 2²² = 10007026819 is a prime.

It is a super-2 number, since 2×10011221123² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10011221098 and 10011221107.

It is not a weakly prime, because it can be changed into another prime (10011221183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005610561 + 5005610562.

It is an arithmetic number, because the mean of its divisors is an integer number (5005610562).

Almost surely, 2^10011221123 is an apocalyptic number.

10011221123 is a deficient number, since it is larger than the sum of its proper divisors (1).

10011221123 is an equidigital number, since it uses as much as digits as its factorization.

10011221123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 10011221123 its reverse (32112211001), we get a palindrome (42123432124).

The spelling of 10011221123 in words is "ten billion, eleven million, two hundred twenty-one thousand, one hundred twenty-three".