121021320303100 has 144 divisors (see below), whose sum is σ = 318042222120000. Its totient is φ = 39020986368000.

The previous prime is 121021320303019. The next prime is 121021320303181. The reversal of 121021320303100 is 1303023120121.

It is an interprime number because it is at equal distance from previous prime (121021320303019) and next prime (121021320303181).

It is a super-2 number, since 2×121021320303100² (a number of 29 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 47 ways as a sum of consecutive naturals, for example, 10791900 + ... + 18934300.

It is an arithmetic number, because the mean of its divisors is an integer number (2208626542500).

Almost surely, 2^{121021320303100} is an apocalyptic number.

121021320303100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121021320303100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159021111060000).

121021320303100 is an abundant number, since it is smaller than the sum of its proper divisors (197020901816900).

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

121021320303100 is a wasteful number, since it uses less digits than its factorization.

121021320303100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8143688 (or 8143681 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 121021320303100 its reverse (1303023120121), we get a palindrome (122324343423221).

The spelling of 121021320303100 in words is "one hundred twenty-one trillion, twenty-one billion, three hundred twenty million, three hundred three thousand, one hundred".