1012102011221 has 16 divisors (see below), whose sum is σ = 1159351186944. Its totient is φ = 865519167744.

The previous prime is 1012102011149. The next prime is 1012102011227. The reversal of 1012102011221 is 1221102012101.

It is not a de Polignac number, because 1012102011221 - 2³⁴ = 994922142037 is a prime.

It is a super-2 number, since 2×1012102011221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012102011196 and 1012102011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012102011227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28350635 + ... + 28386311.

It is an arithmetic number, because the mean of its divisors is an integer number (72459449184).

Almost surely, 2^{1012102011221} is an apocalyptic number.

It is an amenable number.

1012102011221 is a deficient number, since it is larger than the sum of its proper divisors (147249175723).

1012102011221 is an equidigital number, since it uses as much as digits as its factorization.

1012102011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44900.

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

Adding to 1012102011221 its reverse (1221102012101), we get a palindrome (2233204023322).

The spelling of 1012102011221 in words is "one trillion, twelve billion, one hundred two million, eleven thousand, two hundred twenty-one".