211221220220102 has 12 divisors (see below), whose sum is σ = 336565300732260. Its totient is φ = 99398221279776.

The previous prime is 211221220220089. The next prime is 211221220220191. The reversal of 211221220220102 is 201022022122112.

It is a super-2 number, since 2×211221220220102² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 182717317952 + ... + 182717319107.

It is an arithmetic number, because the mean of its divisors is an integer number (28047108394355).

Almost surely, 2^{211221220220102} is an apocalyptic number.

211221220220102 is a deficient number, since it is larger than the sum of its proper divisors (125344080512158).

211221220220102 is a wasteful number, since it uses less digits than its factorization.

211221220220102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365434637095 (or 365434637078 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 211221220220102 its reverse (201022022122112), we get a palindrome (412243242342214).

The spelling of 211221220220102 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred twenty million, two hundred twenty thousand, one hundred two".