21211011212 has 24 divisors (see below), whose sum is σ = 37497200832.
Its totient is φ = 10497584000.
The previous prime is 21211011203. The next prime is 21211011251.
It can be divided in two parts, 212110 and 11212, that added together give a palindrome (223322).
21211011212 is nontrivially palindromic in base 10.
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2611037 + ... + 2619147.
It is an arithmetic number, because the mean of its divisors is an integer number (1562383368).
Almost surely, 221211011212 is an apocalyptic number.
It is an amenable number.
21211011212 is a deficient number, since it is larger than the sum of its proper divisors (16286189620).
21211011212 is a wasteful number, since it uses less digits than its factorization.
21211011212 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 14689 (or 14687 counting only the distinct ones).
The product of its (nonzero) digits is 16, while the sum is 14.
The spelling of 21211011212 in words is "twenty-one billion, two hundred eleven million, eleven thousand, two hundred twelve".