181021124 has 6 divisors (see below), whose sum is σ = 316786974. Its totient is φ = 90510560.

The previous prime is 181021123. The next prime is 181021193. The reversal of 181021124 is 421120181.

It can be written as a sum of positive squares in only one way, i.e., 145974724 + 35046400 = 12082^2 + 5920^2 .

It is a junction number, because it is equal to n+sod(n) for n = 181021096 and 181021105.

It is not an unprimeable number, because it can be changed into a prime (181021123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22627637 + ... + 22627644.

It is an arithmetic number, because the mean of its divisors is an integer number (52797829).

Almost surely, 2^181021124 is an apocalyptic number.

It is an amenable number.

181021124 is a deficient number, since it is larger than the sum of its proper divisors (135765850).

181021124 is a wasteful number, since it uses less digits than its factorization.

181021124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45255285 (or 45255283 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 181021124 is about 13454.4090914466. The cubic root of 181021124 is about 565.6872874600.

The spelling of 181021124 in words is "one hundred eighty-one million, twenty-one thousand, one hundred twenty-four".