121140042210 has 128 divisors (see below), whose sum is σ = 352629504000. Its totient is φ = 29348775360.

The previous prime is 121140042203. The next prime is 121140042227. The reversal of 121140042210 is 12240041121.

121140042210 is a `hidden beast` number, since 1 + 2 + 11 + 400 + 42 + 210 = 666.

It is a super-3 number, since 3×121140042210³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5034027 + ... + 5058033.

It is an arithmetic number, because the mean of its divisors is an integer number (2754918000).

Almost surely, 2^121140042210 is an apocalyptic number.

121140042210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121140042210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176314752000).

121140042210 is an abundant number, since it is smaller than the sum of its proper divisors (231489461790).

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

121140042210 is a wasteful number, since it uses less digits than its factorization.

121140042210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25733 (or 25727 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121140042210 its reverse (12240041121), we get a palindrome (133380083331).

The spelling of 121140042210 in words is "one hundred twenty-one billion, one hundred forty million, forty-two thousand, two hundred ten".