1223123049971 has 4 divisors (see below), whose sum is σ = 1224231956832. Its totient is φ = 1222014143112.

The previous prime is 1223123049959. The next prime is 1223123049983. The reversal of 1223123049971 is 1799403213221.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1223123049959) and next prime (1223123049983).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223123049971 is a prime.

It is a super-2 number, since 2×1223123049971² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223123048971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 554451776 + ... + 554453981.

It is an arithmetic number, because the mean of its divisors is an integer number (306057989208).

Almost surely, 2^{1223123049971} is an apocalyptic number.

1223123049971 is a deficient number, since it is larger than the sum of its proper divisors (1108906861).

1223123049971 is a wasteful number, since it uses less digits than its factorization.

1223123049971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108906860.

The product of its (nonzero) digits is 163296, while the sum is 44.

The spelling of 1223123049971 in words is "one trillion, two hundred twenty-three billion, one hundred twenty-three million, forty-nine thousand, nine hundred seventy-one".