1221120120102 has 8 divisors (see below), whose sum is σ = 2442240240216. Its totient is φ = 407040040032.

The previous prime is 1221120120089. The next prime is 1221120120193. The reversal of 1221120120102 is 2010210211221.

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

1221120120102 is an admirable number.

It is a super-2 number, since 2×1221120120102² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101760010003 + ... + 101760010014.

It is an arithmetic number, because the mean of its divisors is an integer number (305280030027).

Almost surely, 2^{1221120120102} is an apocalyptic number.

1221120120102 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.

1221120120102 is a wasteful number, since it uses less digits than its factorization.

1221120120102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203520020022.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1221120120102 its reverse (2010210211221), we get a palindrome (3231330331323).

The spelling of 1221120120102 in words is "one trillion, two hundred twenty-one billion, one hundred twenty million, one hundred twenty thousand, one hundred two".