221100100102 has 32 divisors (see below), whose sum is σ = 386169228864. Its totient is φ = 92988672000.

The previous prime is 221100100093. The next prime is 221100100121. The reversal of 221100100102 is 201001001122.

It is a super-2 number, since 2×221100100102² (a number of 23 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 15 ways as a sum of consecutive naturals, for example, 532099 + ... + 851662.

It is an arithmetic number, because the mean of its divisors is an integer number (12067788402).

Almost surely, 2^221100100102 is an apocalyptic number.

221100100102 is a deficient number, since it is larger than the sum of its proper divisors (165069128762).

221100100102 is a wasteful number, since it uses less digits than its factorization.

221100100102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383984.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 221100100102 its reverse (201001001122), we get a palindrome (422101101224).

The spelling of 221100100102 in words is "two hundred twenty-one billion, one hundred million, one hundred thousand, one hundred two".