121220111221832 has 32 divisors (see below), whose sum is σ = 261740261977920. Its totient is φ = 51554900080320.

The previous prime is 121220111221831. The next prime is 121220111221883. The reversal of 121220111221832 is 238122111022121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121220111221795 and 121220111221804.

It is not an unprimeable number, because it can be changed into a prime (121220111221831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8261995883 + ... + 8262010554.

It is an arithmetic number, because the mean of its divisors is an integer number (8179383186810).

Almost surely, 2^{121220111221832} is an apocalyptic number.

It is an amenable number.

121220111221832 is an abundant number, since it is smaller than the sum of its proper divisors (140520150756088).

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

121220111221832 is a wasteful number, since it uses less digits than its factorization.

121220111221832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16524006581 (or 16524006577 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 29.

Adding to 121220111221832 its reverse (238122111022121), we get a palindrome (359342222243953).

The spelling of 121220111221832 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty-one thousand, eight hundred thirty-two".