20211011002221 has 32 divisors (see below), whose sum is σ = 29069497242240. Its totient is φ = 12416738918400.

The previous prime is 20211011002207. The next prime is 20211011002339. The reversal of 20211011002221 is 12220011011202.

It is not a de Polignac number, because 20211011002221 - 2⁶ = 20211011002157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20211011002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211011002921) 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, 248224365 + ... + 248305773.

It is an arithmetic number, because the mean of its divisors is an integer number (908421788820).

Almost surely, 2^{20211011002221} is an apocalyptic number.

It is an amenable number.

20211011002221 is a deficient number, since it is larger than the sum of its proper divisors (8858486240019).

20211011002221 is a wasteful number, since it uses less digits than its factorization.

20211011002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91997.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20211011002221 its reverse (12220011011202), we get a palindrome (32431022013423).

The spelling of 20211011002221 in words is "twenty trillion, two hundred eleven billion, eleven million, two thousand, two hundred twenty-one".