1221010000102 has 4 divisors (see below), whose sum is σ = 1831515000156. Its totient is φ = 610505000050.

The previous prime is 1221010000087. The next prime is 1221010000187. The reversal of 1221010000102 is 2010000101221.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305252500024 + ... + 305252500027.

It is an arithmetic number, because the mean of its divisors is an integer number (457878750039).

Almost surely, 2^{1221010000102} is an apocalyptic number.

1221010000102 is a deficient number, since it is larger than the sum of its proper divisors (610505000054).

1221010000102 is an equidigital number, since it uses as much as digits as its factorization.

1221010000102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610505000053.

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

Adding to 1221010000102 its reverse (2010000101221), we get a palindrome (3231010101323).

The spelling of 1221010000102 in words is "one trillion, two hundred twenty-one billion, ten million, one hundred two", and thus it is an aban number.