21212011011104 has 12 divisors (see below), whose sum is σ = 41761146678174. Its totient is φ = 10606005505536.

The previous prime is 21212011011089. The next prime is 21212011011151. The reversal of 21212011011104 is 40111011021212.

It can be written as a sum of positive squares in only one way, i.e., 17707432320400 + 3504578690704 = 4208020^2 + 1872052^2 .

It is a super-2 number, since 2×21212011011104² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331437672017 + ... + 331437672080.

Almost surely, 2^{21212011011104} is an apocalyptic number.

It is an amenable number.

21212011011104 is a deficient number, since it is larger than the sum of its proper divisors (20549135667070).

21212011011104 is an equidigital number, since it uses as much as digits as its factorization.

21212011011104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662875344107 (or 662875344099 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21212011011104 its reverse (40111011021212), we get a palindrome (61323022032316).

The spelling of 21212011011104 in words is "twenty-one trillion, two hundred twelve billion, eleven million, eleven thousand, one hundred four".