1012120012221 has 8 divisors (see below), whose sum is σ = 1349690010240. Its totient is φ = 674648344512.

The previous prime is 1012120012193. The next prime is 1012120012247. The reversal of 1012120012221 is 1222100212101.

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

It is not a de Polignac number, because 1012120012221 - 2⁷ = 1012120012093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1012120012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012120012021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24558556 + ... + 24599733.

It is an arithmetic number, because the mean of its divisors is an integer number (168711251280).

Almost surely, 2^{1012120012221} is an apocalyptic number.

It is an amenable number.

1012120012221 is a deficient number, since it is larger than the sum of its proper divisors (337569998019).

1012120012221 is an equidigital number, since it uses as much as digits as its factorization.

1012120012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49165155.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1012120012221 its reverse (1222100212101), we get a palindrome (2234220224322).

The spelling of 1012120012221 in words is "one trillion, twelve billion, one hundred twenty million, twelve thousand, two hundred twenty-one".