221211202012 has 6 divisors (see below), whose sum is σ = 387119603528. Its totient is φ = 110605601004.

The previous prime is 221211202001. The next prime is 221211202031. The reversal of 221211202012 is 210202112122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27651400248 + ... + 27651400255.

Almost surely, 2^221211202012 is an apocalyptic number.

It is an amenable number.

221211202012 is a deficient number, since it is larger than the sum of its proper divisors (165908401516).

221211202012 is a wasteful number, since it uses less digits than its factorization.

221211202012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55302800507 (or 55302800505 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221211202012 its reverse (210202112122), we get a palindrome (431413314134).

The spelling of 221211202012 in words is "two hundred twenty-one billion, two hundred eleven million, two hundred two thousand, twelve".