21012200222102 has 4 divisors (see below), whose sum is σ = 31518300333156. Its totient is φ = 10506100111050.

The previous prime is 21012200222051. The next prime is 21012200222119. The reversal of 21012200222102 is 20122200221012.

It is a happy number.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5253050055524 + ... + 5253050055527.

It is an arithmetic number, because the mean of its divisors is an integer number (7879575083289).

Almost surely, 2^{21012200222102} is an apocalyptic number.

21012200222102 is a deficient number, since it is larger than the sum of its proper divisors (10506100111054).

21012200222102 is a wasteful number, since it uses less digits than its factorization.

21012200222102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10506100111053.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21012200222102 its reverse (20122200221012), we get a palindrome (41134400443114).

The spelling of 21012200222102 in words is "twenty-one trillion, twelve billion, two hundred million, two hundred twenty-two thousand, one hundred two".