1221030120102 has 16 divisors (see below), whose sum is σ = 2629911028080. Its totient is φ = 375701575392.

The previous prime is 1221030120019. The next prime is 1221030120133. The reversal of 1221030120102 is 2010210301221.

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, 7827116077 + ... + 7827116232.

It is an arithmetic number, because the mean of its divisors is an integer number (164369439255).

Almost surely, 2^{1221030120102} is an apocalyptic number.

1221030120102 is an abundant number, since it is smaller than the sum of its proper divisors (1408880907978).

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

1221030120102 is a wasteful number, since it uses less digits than its factorization.

1221030120102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15654232327.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 1221030120102 its reverse (2010210301221), we get a palindrome (3231240421323).

The spelling of 1221030120102 in words is "one trillion, two hundred twenty-one billion, thirty million, one hundred twenty thousand, one hundred two".