121042023140 has 24 divisors (see below), whose sum is σ = 254676155832. Its totient is φ = 48323874560.

The previous prime is 121042023139. The next prime is 121042023161. The reversal of 121042023140 is 41320240121.

It can be written as a sum of positive squares in 4 ways, for example, as 26801618944 + 94240404196 = 163712^2 + 306986^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5797739 + ... + 5818578.

It is an arithmetic number, because the mean of its divisors is an integer number (10611506493).

Almost surely, 2^121042023140 is an apocalyptic number.

121042023140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121042023140 is an abundant number, since it is smaller than the sum of its proper divisors (133634132692).

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

121042023140 is a wasteful number, since it uses less digits than its factorization.

121042023140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11616847 (or 11616845 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 121042023140 its reverse (41320240121), we get a palindrome (162362263261).

The spelling of 121042023140 in words is "one hundred twenty-one billion, forty-two million, twenty-three thousand, one hundred forty".