121154147531 has 8 divisors (see below), whose sum is σ = 121810100544. Its totient is φ = 120499966080.

The previous prime is 121154147497. The next prime is 121154147533. The reversal of 121154147531 is 135741451121.

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 121154147531 - 2¹⁰ = 121154146507 is a prime.

It is a super-2 number, since 2×121154147531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121154147491 and 121154147500.

It is not an unprimeable number, because it can be changed into a prime (121154147533) 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, 305630 + ... + 579411.

It is an arithmetic number, because the mean of its divisors is an integer number (15226262568).

Almost surely, 2^121154147531 is an apocalyptic number.

121154147531 is a deficient number, since it is larger than the sum of its proper divisors (655953013).

121154147531 is an equidigital number, since it uses as much as digits as its factorization.

121154147531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885781.

The product of its digits is 16800, while the sum is 35.

Adding to 121154147531 its reverse (135741451121), we get a palindrome (256895598652).

The spelling of 121154147531 in words is "one hundred twenty-one billion, one hundred fifty-four million, one hundred forty-seven thousand, five hundred thirty-one".