10221122021 has 4 divisors (see below), whose sum is σ = 11150314944. Its totient is φ = 9291929100.

The previous prime is 10221121951. The next prime is 10221122081. The reversal of 10221122021 is 12022112201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10221122021 - 2¹⁴ = 10221105637 is a prime.

It is a super-2 number, since 2×10221122021² (a number of 21 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 = 10221121987 and 10221122005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221122081) 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, 464596445 + ... + 464596466.

It is an arithmetic number, because the mean of its divisors is an integer number (2787578736).

Almost surely, 2^10221122021 is an apocalyptic number.

10221122021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10221122021 is a deficient number, since it is larger than the sum of its proper divisors (929192923).

10221122021 is an equidigital number, since it uses as much as digits as its factorization.

10221122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929192922.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 10221122021 its reverse (12022112201), we get a palindrome (22243234222).

The spelling of 10221122021 in words is "ten billion, two hundred twenty-one million, one hundred twenty-two thousand, twenty-one".