121221220032330 has 192 divisors, whose sum is σ = 323864973782784. Its totient is φ = 29013546496000.

The previous prime is 121221220032307. The next prime is 121221220032361. The reversal of 121221220032330 is 33230022122121.

It is a super-2 number, since 2×121221220032330² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121221220032330.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 128952067 + ... + 129888713.

It is an arithmetic number, because the mean of its divisors is an integer number (1686796738452).

Almost surely, 2^{121221220032330} is an apocalyptic number.

121221220032330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121221220032330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161932486891392).

121221220032330 is an abundant number, since it is smaller than the sum of its proper divisors (202643753750454).

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

121221220032330 is a wasteful number, since it uses less digits than its factorization.

121221220032330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937133 (or 937122 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 121221220032330 its reverse (33230022122121), we get a palindrome (154451242154451).

The spelling of 121221220032330 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred twenty million, thirty-two thousand, three hundred thirty".