20022220202021 has 8 divisors (see below), whose sum is σ = 20044922352000. Its totient is φ = 19999530041040.

The previous prime is 20022220201993. The next prime is 20022220202029. The reversal of 20022220202021 is 12020202222002.

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-20022220202021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022220202029) 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, 346856 + ... + 6337566.

It is an arithmetic number, because the mean of its divisors is an integer number (2505615294000).

Almost surely, 2^{20022220202021} is an apocalyptic number.

It is an amenable number.

20022220202021 is a deficient number, since it is larger than the sum of its proper divisors (22702149979).

20022220202021 is a wasteful number, since it uses less digits than its factorization.

20022220202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5994499.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 20022220202021 its reverse (12020202222002), we get a palindrome (32042422424023).

The spelling of 20022220202021 in words is "twenty trillion, twenty-two billion, two hundred twenty million, two hundred two thousand, twenty-one".