121021340 has 48 divisors (see below), whose sum is σ = 284032224. Its totient is φ = 42931200.

The previous prime is 121021333. The next prime is 121021343. The reversal of 121021340 is 43120121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2312 + ... + 15728.

It is an arithmetic number, because the mean of its divisors is an integer number (5917338).

Almost surely, 2^121021340 is an apocalyptic number.

121021340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121021340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142016112).

121021340 is an abundant number, since it is smaller than the sum of its proper divisors (163010884).

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

121021340 is a wasteful number, since it uses less digits than its factorization.

121021340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13478 (or 13476 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 121021340 is about 11000.9699572356. The cubic root of 121021340 is about 494.6378196146.

Adding to 121021340 its reverse (43120121), we get a palindrome (164141461).

The spelling of 121021340 in words is "one hundred twenty-one million, twenty-one thousand, three hundred forty".