2111221000123 has 4 divisors (see below), whose sum is σ = 2111958934128. Its totient is φ = 2110483066120.

The previous prime is 2111221000111. The next prime is 2111221000153. The reversal of 2111221000123 is 3210001221112.

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

It is a cyclic number.

It is not a de Polignac number, because 2111221000123 - 2⁹ = 2111220999611 is a prime.

It is a super-2 number, since 2×2111221000123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111221000097 and 2111221000106.

It is not an unprimeable number, because it can be changed into a prime (2111221000153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368962711 + ... + 368968432.

It is an arithmetic number, because the mean of its divisors is an integer number (527989733532).

Almost surely, 2^{2111221000123} is an apocalyptic number.

2111221000123 is a deficient number, since it is larger than the sum of its proper divisors (737934005).

2111221000123 is an equidigital number, since it uses as much as digits as its factorization.

2111221000123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737934004.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 2111221000123 its reverse (3210001221112), we get a palindrome (5321222221235).

The spelling of 2111221000123 in words is "two trillion, one hundred eleven billion, two hundred twenty-one million, one hundred twenty-three", and thus it is an aban number.