121012140 has 96 divisors (see below), whose sum is σ = 360541440. Its totient is φ = 30240000.

The previous prime is 121012139. The next prime is 121012141. The reversal of 121012140 is 41210121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121012139) and next prime (121012141).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (121012141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114615 + ... + 115665.

It is an arithmetic number, because the mean of its divisors is an integer number (3755640).

Almost surely, 2^121012140 is an apocalyptic number.

121012140 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 121012140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180270720).

121012140 is an abundant number, since it is smaller than the sum of its proper divisors (239529300).

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

121012140 is a wasteful number, since it uses less digits than its factorization.

121012140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183 (or 1181 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 121012140 is about 11000.5518043415. The cubic root of 121012140 is about 494.6252852322.

Adding to 121012140 its reverse (41210121), we get a palindrome (162222261).

It can be divided in two parts, 12101 and 2140, that added together give a palindrome (14241).

The spelling of 121012140 in words is "one hundred twenty-one million, twelve thousand, one hundred forty".