10123011221221 has 4 divisors (see below), whose sum is σ = 10125660534444. Its totient is φ = 10120361908000.

The previous prime is 10123011221209. The next prime is 10123011221237. The reversal of 10123011221221 is 12212211032101.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7355546076321 + 2767465144900 = 2712111^2 + 1663570^2 .

It is a cyclic number.

It is not a de Polignac number, because 10123011221221 - 2⁵ = 10123011221189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10123011221251) 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, 1324650880 + ... + 1324658521.

It is an arithmetic number, because the mean of its divisors is an integer number (2531415133611).

Almost surely, 2^{10123011221221} is an apocalyptic number.

It is an amenable number.

10123011221221 is a deficient number, since it is larger than the sum of its proper divisors (2649313223).

10123011221221 is an equidigital number, since it uses as much as digits as its factorization.

10123011221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2649313222.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 10123011221221 its reverse (12212211032101), we get a palindrome (22335222253322).

The spelling of 10123011221221 in words is "ten trillion, one hundred twenty-three billion, eleven million, two hundred twenty-one thousand, two hundred twenty-one".