1121698471 has 4 divisors (see below), whose sum is σ = 1187680752. Its totient is φ = 1055716192.

The previous prime is 1121698423. The next prime is 1121698499. The reversal of 1121698471 is 1748961211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1121698471 - 2⁷ = 1121698343 is a prime.

It is a super-3 number, since 3×1121698471³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121692471) 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, 32991115 + ... + 32991148.

It is an arithmetic number, because the mean of its divisors is an integer number (296920188).

Almost surely, 2^1121698471 is an apocalyptic number.

1121698471 is a deficient number, since it is larger than the sum of its proper divisors (65982281).

1121698471 is an equidigital number, since it uses as much as digits as its factorization.

1121698471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65982280.

The product of its digits is 24192, while the sum is 40.

The square root of 1121698471 is about 33491.7672122568. The cubic root of 1121698471 is about 1039.0235136005.

The spelling of 1121698471 in words is "one billion, one hundred twenty-one million, six hundred ninety-eight thousand, four hundred seventy-one".