13022212021 has 36 divisors (see below), whose sum is σ = 16588419300. Its totient is φ = 10186944768.

The previous prime is 13022211959. The next prime is 13022212051. The reversal of 13022212021 is 12021222031.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 5641512100 + 7380699921 = 75110^2 + 85911^2 .

It is not a de Polignac number, because 13022212021 - 2⁷ = 13022211893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13022211986 and 13022212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13022212051) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 728175 + ... + 745843.

It is an arithmetic number, because the mean of its divisors is an integer number (460789425).

Almost surely, 2^13022212021 is an apocalyptic number.

It is an amenable number.

13022212021 is a deficient number, since it is larger than the sum of its proper divisors (3566207279).

13022212021 is a wasteful number, since it uses less digits than its factorization.

13022212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17798 (or 17778 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 13022212021 its reverse (12021222031), we get a palindrome (25043434052).

The spelling of 13022212021 in words is "thirteen billion, twenty-two million, two hundred twelve thousand, twenty-one".