1001213535 has 16 divisors (see below), whose sum is σ = 1830790656. Its totient is φ = 457697568.

The previous prime is 1001213527. The next prime is 1001213537. The reversal of 1001213535 is 5353121001.

It is not a de Polignac number, because 1001213535 - 2³ = 1001213527 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001213537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4767579 + ... + 4767788.

It is an arithmetic number, because the mean of its divisors is an integer number (114424416).

Almost surely, 2^1001213535 is an apocalyptic number.

1001213535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1001213535 is a deficient number, since it is larger than the sum of its proper divisors (829577121).

1001213535 is an equidigital number, since it uses as much as digits as its factorization.

1001213535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9535382.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 1001213535 is about 31641.9584570867. The cubic root of 1001213535 is about 1000.4043481472.

Adding to 1001213535 its reverse (5353121001), we get a palindrome (6354334536).

The spelling of 1001213535 in words is "one billion, one million, two hundred thirteen thousand, five hundred thirty-five".