1831300121 has 4 divisors (see below), whose sum is σ = 2092914432. Its totient is φ = 1569685812.

The previous prime is 1831300073. The next prime is 1831300127. The reversal of 1831300121 is 1210031381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1831300121 is a prime.

It is a super-2 number, since 2×1831300121² = 6707320266349229282, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1831300093 and 1831300102.

It is not an unprimeable number, because it can be changed into a prime (1831300127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130807145 + ... + 130807158.

It is an arithmetic number, because the mean of its divisors is an integer number (523228608).

Almost surely, 2^1831300121 is an apocalyptic number.

It is an amenable number.

1831300121 is a deficient number, since it is larger than the sum of its proper divisors (261614311).

1831300121 is an equidigital number, since it uses as much as digits as its factorization.

1831300121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261614310.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1831300121 is about 42793.6925375691. The cubic root of 1831300121 is about 1223.4507965243.

The spelling of 1831300121 in words is "one billion, eight hundred thirty-one million, three hundred thousand, one hundred twenty-one".