1801881101 has 2 divisors, whose sum is σ = 1801881102. Its totient is φ = 1801881100.

The previous prime is 1801881077. The next prime is 1801881197. The reversal of 1801881101 is 1011881081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1795555876 + 6325225 = 42374^2 + 2515^2 .

It is a cyclic number.

It is not a de Polignac number, because 1801881101 - 2¹⁴ = 1801864717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1801883101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 900940550 + 900940551.

It is an arithmetic number, because the mean of its divisors is an integer number (900940551).

Almost surely, 2^1801881101 is an apocalyptic number.

It is an amenable number.

1801881101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1801881101 is an equidigital number, since it uses as much as digits as its factorization.

1801881101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 29.

The square root of 1801881101 is about 42448.5700701449. The cubic root of 1801881101 is about 1216.8640010773.

The spelling of 1801881101 in words is "one billion, eight hundred one million, eight hundred eighty-one thousand, one hundred one".