20211422021 has 8 divisors (see below), whose sum is σ = 23099630400. Its totient is φ = 17323429248.

The previous prime is 20211421999. The next prime is 20211422039. The reversal of 20211422021 is 12022411202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20211422021 is a prime.

It is a super-2 number, since 2×20211422021² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211422041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318830 + ... + 376928.

It is an arithmetic number, because the mean of its divisors is an integer number (2887453800).

Almost surely, 2^20211422021 is an apocalyptic number.

It is an amenable number.

20211422021 is a deficient number, since it is larger than the sum of its proper divisors (2888208379).

20211422021 is an equidigital number, since it uses as much as digits as its factorization.

20211422021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107803.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20211422021 its reverse (12022411202), we get a palindrome (32233833223).

The spelling of 20211422021 in words is "twenty billion, two hundred eleven million, four hundred twenty-two thousand, twenty-one".