121751531141 has 8 divisors (see below), whose sum is σ = 128916679320. Its totient is φ = 114586748928.

The previous prime is 121751531129. The next prime is 121751531147. The reversal of 121751531141 is 141135157121.

It can be written as a sum of positive squares in 4 ways, for example, as 17403150241 + 104348380900 = 131921^2 + 323030^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121751531141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121751531098 and 121751531107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121751531147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 901415 + ... + 1027643.

It is an arithmetic number, because the mean of its divisors is an integer number (16114584915).

Almost surely, 2^121751531141 is an apocalyptic number.

It is an amenable number.

121751531141 is a deficient number, since it is larger than the sum of its proper divisors (7165148179).

121751531141 is a wasteful number, since it uses less digits than its factorization.

121751531141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182983.

The product of its digits is 4200, while the sum is 32.

Adding to 121751531141 its reverse (141135157121), we get a palindrome (262886688262).

The spelling of 121751531141 in words is "one hundred twenty-one billion, seven hundred fifty-one million, five hundred thirty-one thousand, one hundred forty-one".