121220220030 has 256 divisors, whose sum is σ = 365048764416. Its totient is φ = 25082265600.

The previous prime is 121220219983. The next prime is 121220220047. The reversal of 121220220030 is 30022022121.

It is a happy number.

It is a super-2 number, since 2×121220220030² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 121220219991 and 121220220009.

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 127 ways as a sum of consecutive naturals, for example, 29921505 + ... + 29925555.

It is an arithmetic number, because the mean of its divisors is an integer number (1425971736).

Almost surely, 2^121220220030 is an apocalyptic number.

121220220030 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 121220220030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182524382208).

121220220030 is an abundant number, since it is smaller than the sum of its proper divisors (243828544386).

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

121220220030 is a wasteful number, since it uses less digits than its factorization.

121220220030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4291.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 121220220030 its reverse (30022022121), we get a palindrome (151242242151).

The spelling of 121220220030 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred twenty thousand, thirty".