22211022421 has 32 divisors (see below), whose sum is σ = 26646225408. Its totient is φ = 18101698560.

The previous prime is 22211022419. The next prime is 22211022437. The reversal of 22211022421 is 12422011222.

It is a cyclic number.

It is not a de Polignac number, because 22211022421 - 2¹ = 22211022419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22211022451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34650261 + ... + 34650901.

It is an arithmetic number, because the mean of its divisors is an integer number (832694544).

Almost surely, 2^22211022421 is an apocalyptic number.

It is an amenable number.

22211022421 is a deficient number, since it is larger than the sum of its proper divisors (4435202987).

22211022421 is a wasteful number, since it uses less digits than its factorization.

22211022421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 22211022421 its reverse (12422011222), we get a palindrome (34633033643).

The spelling of 22211022421 in words is "twenty-two billion, two hundred eleven million, twenty-two thousand, four hundred twenty-one".