1135620021 has 8 divisors (see below), whose sum is σ = 1555083424. Its totient is φ = 736618320.

The previous prime is 1135620001. The next prime is 1135620037. The reversal of 1135620021 is 1200265311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1135620021 - 2⁶ = 1135619957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1135620021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1135620001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5115295 + ... + 5115516.

It is an arithmetic number, because the mean of its divisors is an integer number (194385428).

Almost surely, 2^1135620021 is an apocalyptic number.

It is an amenable number.

1135620021 is a deficient number, since it is larger than the sum of its proper divisors (419463403).

1135620021 is a wasteful number, since it uses less digits than its factorization.

1135620021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10230851.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1135620021 is about 33698.9617199106. The cubic root of 1135620021 is about 1043.3043388550.

Adding to 1135620021 its reverse (1200265311), we get a palindrome (2335885332).

The spelling of 1135620021 in words is "one billion, one hundred thirty-five million, six hundred twenty thousand, twenty-one".