121008106428 has 24 divisors (see below), whose sum is σ = 308020634880. Its totient is φ = 36669123120.

The previous prime is 121008106421. The next prime is 121008106459. The reversal of 121008106428 is 824601800121.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121008106421) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 458363908 + ... + 458364171.

It is an arithmetic number, because the mean of its divisors is an integer number (12834193120).

Almost surely, 2^121008106428 is an apocalyptic number.

It is an amenable number.

121008106428 is an abundant number, since it is smaller than the sum of its proper divisors (187012528452).

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

121008106428 is a wasteful number, since it uses less digits than its factorization.

121008106428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916728097 (or 916728095 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

Adding to 121008106428 its reverse (824601800121), we get a palindrome (945609906549).

The spelling of 121008106428 in words is "one hundred twenty-one billion, eight million, one hundred six thousand, four hundred twenty-eight".