221211210202012 has 12 divisors (see below), whose sum is σ = 396122399664376. Its totient is φ = 108033381726480.

The previous prime is 221211210201937. The next prime is 221211210202043. The reversal of 221211210202012 is 210202012112122.

It is a congruent number.

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, 643055843439 + ... + 643055843782.

Almost surely, 2^{221211210202012} is an apocalyptic number.

It is an amenable number.

221211210202012 is a deficient number, since it is larger than the sum of its proper divisors (174911189462364).

221211210202012 is a wasteful number, since it uses less digits than its factorization.

221211210202012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286111687268 (or 1286111687266 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221211210202012 its reverse (210202012112122), we get a palindrome (431413222314134).

The spelling of 221211210202012 in words is "two hundred twenty-one trillion, two hundred eleven billion, two hundred ten million, two hundred two thousand, twelve".