1221330213102 has 16 divisors (see below), whose sum is σ = 2443236168960. Its totient is φ = 407014113912.

The previous prime is 1221330213097. The next prime is 1221330213113. The reversal of 1221330213102 is 2013120331221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23961702 + ... + 24012617.

It is an arithmetic number, because the mean of its divisors is an integer number (152702260560).

Almost surely, 2^{1221330213102} is an apocalyptic number.

1221330213102 is an abundant number, since it is smaller than the sum of its proper divisors (1221905955858).

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

1221330213102 is a wasteful number, since it uses less digits than its factorization.

1221330213102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47978567.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1221330213102 its reverse (2013120331221), we get a palindrome (3234450544323).

The spelling of 1221330213102 in words is "one trillion, two hundred twenty-one billion, three hundred thirty million, two hundred thirteen thousand, one hundred two".