121540031 has 8 divisors (see below), whose sum is σ = 124731600. Its totient is φ = 118359360.

The previous prime is 121540007. The next prime is 121540033. The reversal of 121540031 is 130045121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121540031 - 2⁶ = 121539967 is a prime.

It is a super-2 number, since 2×121540031² = 29543958270961922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121539991 and 121540009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121540033) by changing a digit.

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, 22985 + ... + 27773.

It is an arithmetic number, because the mean of its divisors is an integer number (15591450).

Almost surely, 2^121540031 is an apocalyptic number.

121540031 is a deficient number, since it is larger than the sum of its proper divisors (3191569).

121540031 is an equidigital number, since it uses as much as digits as its factorization.

121540031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5449.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 121540031 is about 11024.5195360161. The cubic root of 121540031 is about 495.3434761967.

Adding to 121540031 its reverse (130045121), we get a palindrome (251585152).

The spelling of 121540031 in words is "one hundred twenty-one million, five hundred forty thousand, thirty-one".