20202122021 has 8 divisors (see below), whose sum is σ = 20585410560. Its totient is φ = 19822432752.

The previous prime is 20202121997. The next prime is 20202122027. The reversal of 20202122021 is 12022120202.

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-20202122021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20202121987 and 20202122005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202122027) 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, 888485 + ... + 910938.

It is an arithmetic number, because the mean of its divisors is an integer number (2573176320).

Almost surely, 2^20202122021 is an apocalyptic number.

It is an amenable number.

20202122021 is a deficient number, since it is larger than the sum of its proper divisors (383288539).

20202122021 is a wasteful number, since it uses less digits than its factorization.

20202122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1799635.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20202122021 its reverse (12022120202), we get a palindrome (32224242223).

The spelling of 20202122021 in words is "twenty billion, two hundred two million, one hundred twenty-two thousand, twenty-one".