21101100102212 has 12 divisors (see below), whose sum is σ = 39767457885036. Its totient is φ = 9738969277920.

The previous prime is 21101100102169. The next prime is 21101100102281. The reversal of 21101100102212 is 21220100110112.

It can be written as a sum of positive squares in 2 ways, for example, as 1610782335556 + 19490317766656 = 1269166^2 + 4414784^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202895193239 + ... + 202895193342.

It is an arithmetic number, because the mean of its divisors is an integer number (3313954823753).

Almost surely, 2^{21101100102212} is an apocalyptic number.

It is an amenable number.

21101100102212 is a deficient number, since it is larger than the sum of its proper divisors (18666357782824).

21101100102212 is a wasteful number, since it uses less digits than its factorization.

21101100102212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405790386598 (or 405790386596 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21101100102212 its reverse (21220100110112), we get a palindrome (42321200212324).

The spelling of 21101100102212 in words is "twenty-one trillion, one hundred one billion, one hundred million, one hundred two thousand, two hundred twelve".