20210221111102 has 64 divisors (see below), whose sum is σ = 34440092568000. Its totient is φ = 8813730816000.

The previous prime is 20210221111081. The next prime is 20210221111103. The reversal of 20210221111102 is 20111112201202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210221111103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 299781174 + ... + 299848582.

It is an arithmetic number, because the mean of its divisors is an integer number (538126446375).

Almost surely, 2^{20210221111102} is an apocalyptic number.

20210221111102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20210221111102 is a deficient number, since it is larger than the sum of its proper divisors (14229871456898).

20210221111102 is a wasteful number, since it uses less digits than its factorization.

20210221111102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72973.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20210221111102 its reverse (20111112201202), we get a palindrome (40321333312304).

The spelling of 20210221111102 in words is "twenty trillion, two hundred ten billion, two hundred twenty-one million, one hundred eleven thousand, one hundred two".