20211020002221 has 32 divisors (see below), whose sum is σ = 27293304192000. Its totient is φ = 13301624573568.

The previous prime is 20211020002213. The next prime is 20211020002237. The reversal of 20211020002221 is 12220002011202.

It is not a de Polignac number, because 20211020002221 - 2³ = 20211020002213 is a prime.

It is a super-3 number, since 3×20211020002221³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20211020002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211020002241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2498576745 + ... + 2498584833.

It is an arithmetic number, because the mean of its divisors is an integer number (852915756000).

Almost surely, 2^{20211020002221} is an apocalyptic number.

It is an amenable number.

20211020002221 is a deficient number, since it is larger than the sum of its proper divisors (7082284189779).

20211020002221 is a wasteful number, since it uses less digits than its factorization.

20211020002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14513.

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

Adding to 20211020002221 its reverse (12220002011202), we get a palindrome (32431022013423).

The spelling of 20211020002221 in words is "twenty trillion, two hundred eleven billion, twenty million, two thousand, two hundred twenty-one".