2001121434 has 48 divisors (see below), whose sum is σ = 4673963112. Its totient is φ = 615112704.

The previous prime is 2001121433. The next prime is 2001121457. The reversal of 2001121434 is 4341211002.

2001121434 is a `hidden beast` number, since 200 + 11 + 21 + 434 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1865980809 + 135140625 = 43197^2 + 11625^2 .

It is a super-2 number, since 2×2001121434² = 8008973987228432712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2001121433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 266094 + ... + 273510.

Almost surely, 2^2001121434 is an apocalyptic number.

2001121434 is an abundant number, since it is smaller than the sum of its proper divisors (2672841678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001121434 is a wasteful number, since it uses less digits than its factorization.

2001121434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8591 (or 8588 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2001121434 is about 44733.8958062005. The cubic root of 2001121434 is about 1260.1564922786.

Adding to 2001121434 its reverse (4341211002), we get a palindrome (6342332436).

The spelling of 2001121434 in words is "two billion, one million, one hundred twenty-one thousand, four hundred thirty-four".