21022220021001 has 8 divisors (see below), whose sum is σ = 28029668027904. Its totient is φ = 14014792680720.

The previous prime is 21022220020961. The next prime is 21022220021039. The reversal of 21022220021001 is 10012002222012.

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

It is not a de Polignac number, because 21022220021001 - 2²¹ = 21022217923849 is a prime.

It is a super-2 number, since 2×21022220021001² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21022220001001) 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, 2612841 + ... + 6990806.

It is an arithmetic number, because the mean of its divisors is an integer number (3503708503488).

Almost surely, 2^{21022220021001} is an apocalyptic number.

It is an amenable number.

21022220021001 is a deficient number, since it is larger than the sum of its proper divisors (7007448006903).

21022220021001 is an equidigital number, since it uses as much as digits as its factorization.

21022220021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10333311.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21022220021001 its reverse (10012002222012), we get a palindrome (31034222243013).

The spelling of 21022220021001 in words is "twenty-one trillion, twenty-two billion, two hundred twenty million, twenty-one thousand, one".