221012102102 has 16 divisors (see below), whose sum is σ = 362095633152. Its totient is φ = 100337972520.

The previous prime is 221012102083. The next prime is 221012102107. The reversal of 221012102102 is 201201210122.

It is a super-4 number, since 4×221012102102⁴ (a number of 46 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012102107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6085178 + ... + 6121389.

It is an arithmetic number, because the mean of its divisors is an integer number (22630977072).

Almost surely, 2^221012102102 is an apocalyptic number.

221012102102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221012102102 is a deficient number, since it is larger than the sum of its proper divisors (141083531050).

221012102102 is a wasteful number, since it uses less digits than its factorization.

221012102102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12207403.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221012102102 its reverse (201201210122), we get a palindrome (422213312224).

The spelling of 221012102102 in words is "two hundred twenty-one billion, twelve million, one hundred two thousand, one hundred two".