21200012021102 has 4 divisors (see below), whose sum is σ = 31800018031656. Its totient is φ = 10600006010550.

The previous prime is 21200012021099. The next prime is 21200012021117. The reversal of 21200012021102 is 20112021000212.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5300003005274 + ... + 5300003005277.

It is an arithmetic number, because the mean of its divisors is an integer number (7950004507914).

Almost surely, 2^{21200012021102} is an apocalyptic number.

21200012021102 is a deficient number, since it is larger than the sum of its proper divisors (10600006010554).

21200012021102 is a wasteful number, since it uses less digits than its factorization.

21200012021102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10600006010553.

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

Adding to 21200012021102 its reverse (20112021000212), we get a palindrome (41312033021314).

The spelling of 21200012021102 in words is "twenty-one trillion, two hundred billion, twelve million, twenty-one thousand, one hundred two".