21012212201102 has 4 divisors (see below), whose sum is σ = 31518318301656. Its totient is φ = 10506106100550.

The previous prime is 21012212201081. The next prime is 21012212201111. The reversal of 21012212201102 is 20110221221012.

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, 5253053050274 + ... + 5253053050277.

It is an arithmetic number, because the mean of its divisors is an integer number (7879579575414).

Almost surely, 2^{21012212201102} is an apocalyptic number.

21012212201102 is a deficient number, since it is larger than the sum of its proper divisors (10506106100554).

21012212201102 is a wasteful number, since it uses less digits than its factorization.

21012212201102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10506106100553.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21012212201102 its reverse (20110221221012), we get a palindrome (41122433422114).

The spelling of 21012212201102 in words is "twenty-one trillion, twelve billion, two hundred twelve million, two hundred one thousand, one hundred two".