121000142120 has 64 divisors (see below), whose sum is σ = 319846544640. Its totient is φ = 40615430400.

The previous prime is 121000142119. The next prime is 121000142143. The reversal of 121000142120 is 21241000121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121000142095 and 121000142104.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10571216 + ... + 10582655.

It is an arithmetic number, because the mean of its divisors is an integer number (4997602260).

Almost surely, 2^121000142120 is an apocalyptic number.

121000142120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121000142120 is an abundant number, since it is smaller than the sum of its proper divisors (198846402520).

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

121000142120 is a wasteful number, since it uses less digits than its factorization.

121000142120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21153906 (or 21153902 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121000142120 its reverse (21241000121), we get a palindrome (142241142241).

The spelling of 121000142120 in words is "one hundred twenty-one billion, one hundred forty-two thousand, one hundred twenty".