10120001221 has 8 divisors (see below), whose sum is σ = 11055758688. Its totient is φ = 9186870000.

The previous prime is 10120001209. The next prime is 10120001233. The reversal of 10120001221 is 12210002101.

It is an interprime number because it is at equal distance from previous prime (10120001209) and next prime (10120001233).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10120001221 - 2⁵ = 10120001189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10120001198 and 10120001207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10120001251) 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 7 ways as a sum of consecutive naturals, for example, 648495 + ... + 663916.

It is an arithmetic number, because the mean of its divisors is an integer number (1381969836).

Almost surely, 2^10120001221 is an apocalyptic number.

10120001221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10120001221 is a deficient number, since it is larger than the sum of its proper divisors (935757467).

10120001221 is a wasteful number, since it uses less digits than its factorization.

10120001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313123.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 10120001221 its reverse (12210002101), we get a palindrome (22330003322).

The spelling of 10120001221 in words is "ten billion, one hundred twenty million, one thousand, two hundred twenty-one".