121031047 has 4 divisors (see below), whose sum is σ = 121135576. Its totient is φ = 120926520.

The previous prime is 121031021. The next prime is 121031051. The reversal of 121031047 is 740130121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 740130121 = 101 ⋅7328021.

It is a cyclic number.

It is not a de Polignac number, because 121031047 - 2⁷ = 121030919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121031147) 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, 50508 + ... + 52849.

It is an arithmetic number, because the mean of its divisors is an integer number (30283894).

Almost surely, 2^121031047 is an apocalyptic number.

121031047 is a deficient number, since it is larger than the sum of its proper divisors (104529).

121031047 is a wasteful number, since it uses less digits than its factorization.

121031047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104528.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 121031047 is about 11001.4111367588. The cubic root of 121031047 is about 494.6510440617.

Adding to 121031047 its reverse (740130121), we get a palindrome (861161168).

The spelling of 121031047 in words is "one hundred twenty-one million, thirty-one thousand, forty-seven".