22101323021 has 4 divisors (see below), whose sum is σ = 22109758044. Its totient is φ = 22092888000.

The previous prime is 22101322973. The next prime is 22101323039. The reversal of 22101323021 is 12032310122.

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 7671307396 + 14430015625 = 87586^2 + 120125^2 .

It is a cyclic number.

It is not a de Polignac number, because 22101323021 - 2²⁶ = 22034214157 is a prime.

It is a super-3 number, since 3×22101323021³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22101323071) 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, 4213580 + ... + 4218821.

It is an arithmetic number, because the mean of its divisors is an integer number (5527439511).

Almost surely, 2^22101323021 is an apocalyptic number.

It is an amenable number.

22101323021 is a deficient number, since it is larger than the sum of its proper divisors (8435023).

22101323021 is an equidigital number, since it uses as much as digits as its factorization.

22101323021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8435022.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 22101323021 its reverse (12032310122), we get a palindrome (34133633143).

It can be divided in two parts, 2210 and 1323021, that added together give a palindrome (1325231).

The spelling of 22101323021 in words is "twenty-two billion, one hundred one million, three hundred twenty-three thousand, twenty-one".