1631201123 has 2 divisors, whose sum is σ = 1631201124. Its totient is φ = 1631201122.

The previous prime is 1631201107. The next prime is 1631201177. The reversal of 1631201123 is 3211021361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1631201123 - 2⁴ = 1631201107 is a prime.

It is a super-2 number, since 2×1631201123² = 5321634207352922258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1631201095 and 1631201104.

It is not a weakly prime, because it can be changed into another prime (1631204123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815600561 + 815600562.

It is an arithmetic number, because the mean of its divisors is an integer number (815600562).

Almost surely, 2^1631201123 is an apocalyptic number.

1631201123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1631201123 is an equidigital number, since it uses as much as digits as its factorization.

1631201123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1631201123 is about 40388.1309669066. The cubic root of 1631201123 is about 1177.1609241210.

Adding to 1631201123 its reverse (3211021361), we get a palindrome (4842222484).

The spelling of 1631201123 in words is "one billion, six hundred thirty-one million, two hundred one thousand, one hundred twenty-three".