221211112102 has 4 divisors (see below), whose sum is σ = 331816668156. Its totient is φ = 110605556050.

The previous prime is 221211112091. The next prime is 221211112153. The reversal of 221211112102 is 201211112122.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×221211112102³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 55302778024 + ... + 55302778027.

It is an arithmetic number, because the mean of its divisors is an integer number (82954167039).

Almost surely, 2^221211112102 is an apocalyptic number.

221211112102 is a deficient number, since it is larger than the sum of its proper divisors (110605556054).

221211112102 is a wasteful number, since it uses less digits than its factorization.

221211112102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110605556053.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221211112102 its reverse (201211112122), we get a palindrome (422422224224).

The spelling of 221211112102 in words is "two hundred twenty-one billion, two hundred eleven million, one hundred twelve thousand, one hundred two".