21210020021102 has 24 divisors (see below), whose sum is σ = 35053304492136. Its totient is φ = 9618018102000.

The previous prime is 21210020021093. The next prime is 21210020021143. The reversal of 21210020021102 is 20112002001212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103989224 + ... + 104192987.

It is an arithmetic number, because the mean of its divisors is an integer number (1460554353839).

Almost surely, 2^{21210020021102} is an apocalyptic number.

21210020021102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21210020021102 is a deficient number, since it is larger than the sum of its proper divisors (13843284471034).

21210020021102 is a wasteful number, since it uses less digits than its factorization.

21210020021102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208182656 (or 208182645 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21210020021102 its reverse (20112002001212), we get a palindrome (41322022022314).

It can be divided in two parts, 212100 and 20021102, that added together give a palindrome (20233202).

The spelling of 21210020021102 in words is "twenty-one trillion, two hundred ten billion, twenty million, twenty-one thousand, one hundred two".