121221201222030 has 64 divisors (see below), whose sum is σ = 358068779002368. Its totient is φ = 25576341356160.

The previous prime is 121221201222001. The next prime is 121221201222041. The reversal of 121221201222030 is 30222102122121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 121221201221988 and 121221201222006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22201682476 + ... + 22201687935.

It is an arithmetic number, because the mean of its divisors is an integer number (5594824671912).

Almost surely, 2^{121221201222030} is an apocalyptic number.

121221201222030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121221201222030 is an abundant number, since it is smaller than the sum of its proper divisors (236847577780338).

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

121221201222030 is a wasteful number, since it uses less digits than its factorization.

121221201222030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44403370441.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 121221201222030 its reverse (30222102122121), we get a palindrome (151443303344151).

Subtracting from 121221201222030 its reverse (30222102122121), we obtain a palindrome (90999099099909).

The spelling of 121221201222030 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred one million, two hundred twenty-two thousand, thirty".