40002130021 has 16 divisors (see below), whose sum is σ = 47677987840. Its totient is φ = 32839395840.

The previous prime is 40002129967. The next prime is 40002130037. The reversal of 40002130021 is 12003120004.

It is a cyclic number.

It is not a de Polignac number, because 40002130021 - 2²³ = 39993741413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40002129983 and 40002130010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40002130061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 929166 + ... + 971263.

It is an arithmetic number, because the mean of its divisors is an integer number (2979874240).

Almost surely, 2^40002130021 is an apocalyptic number.

It is an amenable number.

40002130021 is a deficient number, since it is larger than the sum of its proper divisors (7675857819).

40002130021 is a wasteful number, since it uses less digits than its factorization.

40002130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1900564.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 40002130021 its reverse (12003120004), we get a palindrome (52005250025).

The spelling of 40002130021 in words is "forty billion, two million, one hundred thirty thousand, twenty-one".