1221012102 has 8 divisors (see below), whose sum is σ = 2442024216. Its totient is φ = 407004032.

The previous prime is 1221012083. The next prime is 1221012119. The reversal of 1221012102 is 2012101221.

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

1221012102 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101751003 + ... + 101751014.

It is an arithmetic number, because the mean of its divisors is an integer number (305253027).

Almost surely, 2^1221012102 is an apocalyptic number.

1221012102 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221012102 is a wasteful number, since it uses less digits than its factorization.

1221012102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203502022.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1221012102 is about 34942.9835875530. The cubic root of 1221012102 is about 1068.8251296455.

Adding to 1221012102 its reverse (2012101221), we get a palindrome (3233113323).

The spelling of 1221012102 in words is "one billion, two hundred twenty-one million, twelve thousand, one hundred two".