21222201121001 has 8 divisors (see below), whose sum is σ = 21229131352800. Its totient is φ = 21215271837600.

The previous prime is 21222201120941. The next prime is 21222201121019. The reversal of 21222201121001 is 10012110222212.

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 21222201121001 - 2¹⁸ = 21222200858857 is a prime.

It is a super-2 number, since 2×21222201121001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222201121301) 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, 45985085 + ... + 46444293.

It is an arithmetic number, because the mean of its divisors is an integer number (2653641419100).

Almost surely, 2^{21222201121001} is an apocalyptic number.

It is an amenable number.

21222201121001 is a deficient number, since it is larger than the sum of its proper divisors (6930231799).

21222201121001 is a wasteful number, since it uses less digits than its factorization.

21222201121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474199.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21222201121001 its reverse (10012110222212), we get a palindrome (31234311343213).

The spelling of 21222201121001 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred one million, one hundred twenty-one thousand, one".