211221012220102 has 32 divisors (see below), whose sum is σ = 317914511618304. Its totient is φ = 105250094258400.

The previous prime is 211221012220093. The next prime is 211221012220123. The reversal of 211221012220102 is 201022210122112.

It is a super-2 number, since 2×211221012220102² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211221012220102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7341440977 + ... + 7341469747.

It is an arithmetic number, because the mean of its divisors is an integer number (9934828488072).

Almost surely, 2^{211221012220102} is an apocalyptic number.

211221012220102 is a deficient number, since it is larger than the sum of its proper divisors (106693499398202).

211221012220102 is a wasteful number, since it uses less digits than its factorization.

211221012220102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38524.

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

Adding to 211221012220102 its reverse (201022210122112), we get a palindrome (412243222342214).

The spelling of 211221012220102 in words is "two hundred eleven trillion, two hundred twenty-one billion, twelve million, two hundred twenty thousand, one hundred two".