20202021221111 has 8 divisors (see below), whose sum is σ = 20458358937600. Its totient is φ = 19945698903000.

The previous prime is 20202021221087. The next prime is 20202021221141. The reversal of 20202021221111 is 11112212020202.

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 20202021221111 - 2¹⁸ = 20202020958967 is a prime.

It is a super-2 number, since 2×20202021221111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20202021221111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202021221141) 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, 1197515 + ... + 6468236.

It is an arithmetic number, because the mean of its divisors is an integer number (2557294867200).

Almost surely, 2^{20202021221111} is an apocalyptic number.

20202021221111 is a deficient number, since it is larger than the sum of its proper divisors (256337716489).

20202021221111 is an equidigital number, since it uses as much as digits as its factorization.

20202021221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7699189.

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

Adding to 20202021221111 its reverse (11112212020202), we get a palindrome (31314233241313).

The spelling of 20202021221111 in words is "twenty trillion, two hundred two billion, twenty-one million, two hundred twenty-one thousand, one hundred eleven".