21210012101011 has 8 divisors (see below), whose sum is σ = 22801356794880. Its totient is φ = 19666170233928.

The previous prime is 21210012100987. The next prime is 21210012101021. The reversal of 21210012101011 is 11010121001212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21210012101011 - 2¹¹ = 21210012098963 is a prime.

It is a super-2 number, since 2×21210012101011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21210012100982 and 21210012101000.

It is not an unprimeable number, because it can be changed into a prime (21210012101021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11875705771 + ... + 11875707556.

It is an arithmetic number, because the mean of its divisors is an integer number (2850169599360).

Almost surely, 2^{21210012101011} is an apocalyptic number.

21210012101011 is a deficient number, since it is larger than the sum of its proper divisors (1591344693869).

21210012101011 is a wasteful number, since it uses less digits than its factorization.

21210012101011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23751413393.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21210012101011 its reverse (11010121001212), we get a palindrome (32220133102223).

The spelling of 21210012101011 in words is "twenty-one trillion, two hundred ten billion, twelve million, one hundred one thousand, eleven".