101222031221 has 4 divisors (see below), whose sum is σ = 102881408844. Its totient is φ = 99562653600.

The previous prime is 101222031187. The next prime is 101222031241. The reversal of 101222031221 is 122130222101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31750250596 + 69471780625 = 178186^2 + 263575^2 .

It is a cyclic number.

It is not a de Polignac number, because 101222031221 - 2¹⁰ = 101222030197 is a prime.

It is a super-3 number, since 3×101222031221³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101222031221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101222031241) 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, 829688720 + ... + 829688841.

It is an arithmetic number, because the mean of its divisors is an integer number (25720352211).

Almost surely, 2^101222031221 is an apocalyptic number.

It is an amenable number.

101222031221 is a deficient number, since it is larger than the sum of its proper divisors (1659377623).

101222031221 is an equidigital number, since it uses as much as digits as its factorization.

101222031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659377622.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 101222031221 its reverse (122130222101), we get a palindrome (223352253322).

The spelling of 101222031221 in words is "one hundred one billion, two hundred twenty-two million, thirty-one thousand, two hundred twenty-one".