1111488921 has 9 divisors (see below), whose sum is σ = 1605628479. Its totient is φ = 740925936.

The previous prime is 1111488907. The next prime is 1111488949. The reversal of 1111488921 is 1298841111.

The square root of 1111488921 is 33339.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4995225 + 1106493696 = 2235^2 + 33264^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1111488921 - 2¹³ = 1111480729 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1111488121) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 94461 + ... + 105573.

Almost surely, 2^1111488921 is an apocalyptic number.

1111488921 is the 33339-th square number.

1111488921 is the 16670-th centered octagonal number.

It is an amenable number.

1111488921 is a deficient number, since it is larger than the sum of its proper divisors (494139558).

1111488921 is an frugal number, since it uses more digits than its factorization.

1111488921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22232 (or 11116 counting only the distinct ones).

The product of its digits is 4608, while the sum is 36.

The cubic root of 1111488921 is about 1035.8615496648.

Multiplying 1111488921 by its sum of digits (36), we get a square (40013601156 = 200034²).

The spelling of 1111488921 in words is "one billion, one hundred eleven million, four hundred eighty-eight thousand, nine hundred twenty-one".