1221100102102 has 8 divisors (see below), whose sum is σ = 1831710241800. Its totient is φ = 610530021504.

The previous prime is 1221100102097. The next prime is 1221100102111. The reversal of 1221100102102 is 2012010011221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9938452 + ... + 10060567.

It is an arithmetic number, because the mean of its divisors is an integer number (228963780225).

Almost surely, 2^{1221100102102} is an apocalyptic number.

1221100102102 is a deficient number, since it is larger than the sum of its proper divisors (610610139698).

1221100102102 is a wasteful number, since it uses less digits than its factorization.

1221100102102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20029550.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1221100102102 its reverse (2012010011221), we get a palindrome (3233110113323).

The spelling of 1221100102102 in words is "one trillion, two hundred twenty-one billion, one hundred million, one hundred two thousand, one hundred two".