121031442 has 128 divisors (see below), whose sum is σ = 324979200. Its totient is φ = 32659200.

The previous prime is 121031437. The next prime is 121031461. The reversal of 121031442 is 244130121.

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, 668592 + ... + 668772.

It is an arithmetic number, because the mean of its divisors is an integer number (2538900).

Almost surely, 2^121031442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121031442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162489600).

121031442 is an abundant number, since it is smaller than the sum of its proper divisors (203947758).

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

121031442 is a wasteful number, since it uses less digits than its factorization.

121031442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 121031442 is about 11001.4290889866. The cubic root of 121031442 is about 494.6515821797.

Adding to 121031442 its reverse (244130121), we get a palindrome (365161563).

The spelling of 121031442 in words is "one hundred twenty-one million, thirty-one thousand, four hundred forty-two".