22421253021 has 16 divisors (see below), whose sum is σ = 30280715520. Its totient is φ = 14755659840.

The previous prime is 22421252981. The next prime is 22421253079. The reversal of 22421253021 is 12035212422.

It is not a de Polignac number, because 22421253021 - 2⁶ = 22421252957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22421252982 and 22421253000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22421253121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37890 + ... + 215123.

It is an arithmetic number, because the mean of its divisors is an integer number (1892544720).

Almost surely, 2^22421253021 is an apocalyptic number.

It is an amenable number.

22421253021 is a deficient number, since it is larger than the sum of its proper divisors (7859462499).

22421253021 is a wasteful number, since it uses less digits than its factorization.

22421253021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253396.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 22421253021 its reverse (12035212422), we get a palindrome (34456465443).

The spelling of 22421253021 in words is "twenty-two billion, four hundred twenty-one million, two hundred fifty-three thousand, twenty-one".