121002140 has 24 divisors (see below), whose sum is σ = 290405472. Its totient is φ = 41486400.

The previous prime is 121002121. The next prime is 121002157. The reversal of 121002140 is 41200121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432011 + ... + 432290.

It is an arithmetic number, because the mean of its divisors is an integer number (12100228).

Almost surely, 2^121002140 is an apocalyptic number.

121002140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121002140 is an abundant number, since it is smaller than the sum of its proper divisors (169403332).

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

121002140 is a wasteful number, since it uses less digits than its factorization.

121002140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864317 (or 864315 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 121002140 is about 11000.0972722972. The cubic root of 121002140 is about 494.6116601829.

Adding to 121002140 its reverse (41200121), we get a palindrome (162202261).

The spelling of 121002140 in words is "one hundred twenty-one million, two thousand, one hundred forty".