21122201001 has 8 divisors (see below), whose sum is σ = 30723201504. Its totient is φ = 12801333920.

The previous prime is 21122200999. The next prime is 21122201027. The reversal of 21122201001 is 10010222112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21122201001 - 2¹ = 21122200999 is a prime.

It is a super-2 number, since 2×21122201001² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122201071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320033316 + ... + 320033381.

It is an arithmetic number, because the mean of its divisors is an integer number (3840400188).

Almost surely, 2^21122201001 is an apocalyptic number.

It is an amenable number.

21122201001 is a deficient number, since it is larger than the sum of its proper divisors (9601000503).

21122201001 is a wasteful number, since it uses less digits than its factorization.

21122201001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640066711.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21122201001 its reverse (10010222112), we get a palindrome (31132423113).

The spelling of 21122201001 in words is "twenty-one billion, one hundred twenty-two million, two hundred one thousand, one".