22421011021 has 2 divisors, whose sum is σ = 22421011022. Its totient is φ = 22421011020.

The previous prime is 22421010929. The next prime is 22421011043. The reversal of 22421011021 is 12011012422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18115814025 + 4305196996 = 134595^2 + 65614^2 .

It is a cyclic number.

It is not a de Polignac number, because 22421011021 - 2⁷ = 22421010893 is a prime.

It is a super-3 number, since 3×22421011021³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22421010986 and 22421011004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22421011321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11210505510 + 11210505511.

It is an arithmetic number, because the mean of its divisors is an integer number (11210505511).

Almost surely, 2^22421011021 is an apocalyptic number.

It is an amenable number.

22421011021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22421011021 is an equidigital number, since it uses as much as digits as its factorization.

22421011021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22421011021 its reverse (12011012422), we get a palindrome (34432023443).

The spelling of 22421011021 in words is "twenty-two billion, four hundred twenty-one million, eleven thousand, twenty-one".