10221121213 has 4 divisors (see below), whose sum is σ = 10221411708. Its totient is φ = 10220830720.

The previous prime is 10221121201. The next prime is 10221121217. The reversal of 10221121213 is 31212112201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31212112201 = 127 ⋅245764663.

It can be written as a sum of positive squares in 2 ways, for example, as 6383690404 + 3837430809 = 79898^2 + 61947^2 .

It is a cyclic number.

It is not a de Polignac number, because 10221121213 - 2⁵ = 10221121181 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 (10221121217) 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, 83806 + ... + 165727.

It is an arithmetic number, because the mean of its divisors is an integer number (2555352927).

Almost surely, 2^10221121213 is an apocalyptic number.

It is an amenable number.

10221121213 is a deficient number, since it is larger than the sum of its proper divisors (290495).

10221121213 is an equidigital number, since it uses as much as digits as its factorization.

10221121213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290494.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 10221121213 its reverse (31212112201), we get a palindrome (41433233414).

The spelling of 10221121213 in words is "ten billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred thirteen".