121001144 has 16 divisors (see below), whose sum is σ = 247502520. Its totient is φ = 55000480.

The previous prime is 121001141. The next prime is 121001161. The reversal of 121001144 is 441100121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687419 + ... + 687594.

Almost surely, 2^121001144 is an apocalyptic number.

It is an amenable number.

121001144 is an abundant number, since it is smaller than the sum of its proper divisors (126501376).

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

121001144 is a wasteful number, since it uses less digits than its factorization.

121001144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375030 (or 1375026 counting only the distinct ones).

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

The square root of 121001144 is about 11000.0519998771. The cubic root of 121001144 is about 494.6103030869.

Adding to 121001144 its reverse (441100121), we get a palindrome (562101265).

The spelling of 121001144 in words is "one hundred twenty-one million, one thousand, one hundred forty-four".