10112120001221 has 4 divisors (see below), whose sum is σ = 11556708572832. Its totient is φ = 8667531429612.

The previous prime is 10112120001209. The next prime is 10112120001289. The reversal of 10112120001221 is 12210002121101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10112120001221 - 2³⁰ = 10111046259397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10112120001196 and 10112120001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10112120051221) 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, 722294285795 + ... + 722294285808.

It is an arithmetic number, because the mean of its divisors is an integer number (2889177143208).

Almost surely, 2^{10112120001221} is an apocalyptic number.

It is an amenable number.

10112120001221 is a deficient number, since it is larger than the sum of its proper divisors (1444588571611).

10112120001221 is an equidigital number, since it uses as much as digits as its factorization.

10112120001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444588571610.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 10112120001221 its reverse (12210002121101), we get a palindrome (22322122122322).

The spelling of 10112120001221 in words is "ten trillion, one hundred twelve billion, one hundred twenty million, one thousand, two hundred twenty-one".