21011002212009 has 8 divisors (see below), whose sum is σ = 28014921519520. Its totient is φ = 14007208856256.

The previous prime is 21011002212007. The next prime is 21011002212071. The reversal of 21011002212009 is 90021220011012.

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

It is not a de Polignac number, because 21011002212009 - 2¹ = 21011002212007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21011002212007) 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, 31098007 + ... + 31766460.

It is an arithmetic number, because the mean of its divisors is an integer number (3501865189940).

Almost surely, 2^{21011002212009} is an apocalyptic number.

It is an amenable number.

21011002212009 is a deficient number, since it is larger than the sum of its proper divisors (7003919307511).

21011002212009 is a wasteful number, since it uses less digits than its factorization.

21011002212009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62975879.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 21011002212009 in words is "twenty-one trillion, eleven billion, two million, two hundred twelve thousand, nine".