21001032221102 has 16 divisors (see below), whose sum is σ = 31982004931920. Its totient is φ = 10340464736448.

The previous prime is 21001032221089. The next prime is 21001032221107. The reversal of 21001032221102 is 20112223010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001032221107) 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, 24788303 + ... + 25621514.

It is an arithmetic number, because the mean of its divisors is an integer number (1998875308245).

Almost surely, 2^{21001032221102} is an apocalyptic number.

21001032221102 is a deficient number, since it is larger than the sum of its proper divisors (10980972710818).

21001032221102 is a wasteful number, since it uses less digits than its factorization.

21001032221102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50412995.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21001032221102 its reverse (20112223010012), we get a palindrome (41113255231114).

The spelling of 21001032221102 in words is "twenty-one trillion, one billion, thirty-two million, two hundred twenty-one thousand, one hundred two".