21210012011006 has 48 divisors (see below), whose sum is σ = 40007798599776. Its totient is φ = 8212246720704.

The previous prime is 21210012010939. The next prime is 21210012011047. The reversal of 21210012011006 is 60011021001212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25976081 + ... + 26780156.

It is an arithmetic number, because the mean of its divisors is an integer number (833495804162).

Almost surely, 2^{21210012011006} is an apocalyptic number.

21210012011006 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21210012011006 is a deficient number, since it is larger than the sum of its proper divisors (18797786588770).

21210012011006 is a wasteful number, since it uses less digits than its factorization.

21210012011006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52756353 (or 52756306 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21210012011006 its reverse (60011021001212), we get a palindrome (81221033012218).

The spelling of 21210012011006 in words is "twenty-one trillion, two hundred ten billion, twelve million, eleven thousand, six".