1012221100123 has 4 divisors (see below), whose sum is σ = 1026477735408. Its totient is φ = 997964464840.

The previous prime is 1012221100109. The next prime is 1012221100223. The reversal of 1012221100123 is 3210011222101.

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 1012221100123 - 2³³ = 1003631165531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012221100097 and 1012221100106.

It is not an unprimeable number, because it can be changed into a prime (1012221100223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7128317536 + ... + 7128317677.

It is an arithmetic number, because the mean of its divisors is an integer number (256619433852).

Almost surely, 2^{1012221100123} is an apocalyptic number.

1012221100123 is a deficient number, since it is larger than the sum of its proper divisors (14256635285).

1012221100123 is an equidigital number, since it uses as much as digits as its factorization.

1012221100123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14256635284.

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

Adding to 1012221100123 its reverse (3210011222101), we get a palindrome (4222232322224).

The spelling of 1012221100123 in words is "one trillion, twelve billion, two hundred twenty-one million, one hundred thousand, one hundred twenty-three".