1221330210102 has 40 divisors (see below), whose sum is σ = 2777530419576. Its totient is φ = 401033796768.

The previous prime is 1221330210091. The next prime is 1221330210127. The reversal of 1221330210102 is 2010120331221.

1221330210102 is a `hidden beast` number, since 1 + 2 + 21 + 330 + 210 + 102 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 56250903 + ... + 56272610.

Almost surely, 2^{1221330210102} is an apocalyptic number.

1221330210102 is an abundant number, since it is smaller than the sum of its proper divisors (1556200209474).

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

1221330210102 is a wasteful number, since it uses less digits than its factorization.

1221330210102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112523594 (or 112523585 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1221330210102 its reverse (2010120331221), we get a palindrome (3231450541323).

The spelling of 1221330210102 in words is "one trillion, two hundred twenty-one billion, three hundred thirty million, two hundred ten thousand, one hundred two".