22021210001 has 24 divisors (see below), whose sum is σ = 27063745920. Its totient is φ = 17836641312.

The previous prime is 22021209997. The next prime is 22021210019. The reversal of 22021210001 is 10001212022.

It is a happy number.

It is not a de Polignac number, because 22021210001 - 2² = 22021209997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22021210021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98075 + ... + 231648.

It is an arithmetic number, because the mean of its divisors is an integer number (1127656080).

Almost surely, 2^22021210001 is an apocalyptic number.

It is an amenable number.

22021210001 is a deficient number, since it is larger than the sum of its proper divisors (5042535919).

22021210001 is a wasteful number, since it uses less digits than its factorization.

22021210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329813 (or 329806 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 22021210001 its reverse (10001212022), we get a palindrome (32022422023).

The spelling of 22021210001 in words is "twenty-two billion, twenty-one million, two hundred ten thousand, one".