1221310102 has 16 divisors (see below), whose sum is σ = 1853448480. Its totient is φ = 603524992.

The previous prime is 1221310099. The next prime is 1221310109. The reversal of 1221310102 is 2010131221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221310109) 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, 73608 + ... + 88660.

It is an arithmetic number, because the mean of its divisors is an integer number (115840530).

Almost surely, 2^1221310102 is an apocalyptic number.

1221310102 is a deficient number, since it is larger than the sum of its proper divisors (632138378).

1221310102 is a wasteful number, since it uses less digits than its factorization.

1221310102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15527.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1221310102 is about 34947.2474166421. The cubic root of 1221310102 is about 1068.9120749973.

Adding to 1221310102 its reverse (2010131221), we get a palindrome (3231441323).

The spelling of 1221310102 in words is "one billion, two hundred twenty-one million, three hundred ten thousand, one hundred two".