161121240124 has 48 divisors (see below), whose sum is σ = 310992409728. Its totient is φ = 72574875648.

The previous prime is 161121240121. The next prime is 161121240139. The reversal of 161121240124 is 421042121161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161121240121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 769354 + ... + 956110.

It is an arithmetic number, because the mean of its divisors is an integer number (6479008536).

Almost surely, 2^161121240124 is an apocalyptic number.

It is an amenable number.

161121240124 is a deficient number, since it is larger than the sum of its proper divisors (149871169604).

161121240124 is a wasteful number, since it uses less digits than its factorization.

161121240124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187174 (or 187172 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

Adding to 161121240124 its reverse (421042121161), we get a palindrome (582163361285).

The spelling of 161121240124 in words is "one hundred sixty-one billion, one hundred twenty-one million, two hundred forty thousand, one hundred twenty-four".