1101880921 has 2 divisors, whose sum is σ = 1101880922. Its totient is φ = 1101880920.

The previous prime is 1101880853. The next prime is 1101880931. The reversal of 1101880921 is 1290881011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1089000000 + 12880921 = 33000^2 + 3589^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1101880921 is a prime.

It is not a weakly prime, because it can be changed into another prime (1101880931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550940460 + 550940461.

It is an arithmetic number, because the mean of its divisors is an integer number (550940461).

Almost surely, 2^1101880921 is an apocalyptic number.

It is an amenable number.

1101880921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101880921 is an equidigital number, since it uses as much as digits as its factorization.

1101880921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 31.

The square root of 1101880921 is about 33194.5917432343. The cubic root of 1101880921 is about 1032.8681553686.

The spelling of 1101880921 in words is "one billion, one hundred one million, eight hundred eighty thousand, nine hundred twenty-one".