21212011102102 has 32 divisors (see below), whose sum is σ = 32368124426400. Its totient is φ = 10424191008000.

The previous prime is 21212011102091. The next prime is 21212011102103. The reversal of 21212011102102 is 20120111021212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212011102103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 258866274 + ... + 258948202.

It is an arithmetic number, because the mean of its divisors is an integer number (1011503888325).

Almost surely, 2^{21212011102102} is an apocalyptic number.

21212011102102 is a deficient number, since it is larger than the sum of its proper divisors (11156113324298).

21212011102102 is a wasteful number, since it uses less digits than its factorization.

21212011102102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91392.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21212011102102 its reverse (20120111021212), we get a palindrome (41332122123314).

The spelling of 21212011102102 in words is "twenty-one trillion, two hundred twelve billion, eleven million, one hundred two thousand, one hundred two".