121021012 has 48 divisors (see below), whose sum is σ = 249500160. Its totient is φ = 50284800.

The previous prime is 121021007. The next prime is 121021037. The reversal of 121021012 is 210120121.

It is a self number, because there is not a number n which added to its sum of digits gives 121021012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310914 + ... + 311302.

It is an arithmetic number, because the mean of its divisors is an integer number (5197920).

Almost surely, 2^121021012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121021012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124750080).

121021012 is an abundant number, since it is smaller than the sum of its proper divisors (128479148).

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

121021012 is a wasteful number, since it uses less digits than its factorization.

121021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712 (or 710 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 121021012 is about 11000.9550494491. The cubic root of 121021012 is about 494.6373727475.

Adding to 121021012 its reverse (210120121), we get a palindrome (331141133).

It can be divided in two parts, 1210 and 21012, that added together give a palindrome (22222).

The spelling of 121021012 in words is "one hundred twenty-one million, twenty-one thousand, twelve".