21021131001 has 8 divisors (see below), whose sum is σ = 30184188160. Its totient is φ = 12936080592.

The previous prime is 21021130967. The next prime is 21021131041. The reversal of 21021131001 is 10013112012.

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

It is not a de Polignac number, because 21021131001 - 2⁶ = 21021130937 is a prime.

It is a super-2 number, since 2×21021131001² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21021131041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269501641 + ... + 269501718.

It is an arithmetic number, because the mean of its divisors is an integer number (3773023520).

Almost surely, 2^21021131001 is an apocalyptic number.

It is an amenable number.

21021131001 is a deficient number, since it is larger than the sum of its proper divisors (9163057159).

21021131001 is a wasteful number, since it uses less digits than its factorization.

21021131001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539003375.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 21021131001 its reverse (10013112012), we get a palindrome (31034243013).

The spelling of 21021131001 in words is "twenty-one billion, twenty-one million, one hundred thirty-one thousand, one".