21212001011110 has 32 divisors (see below), whose sum is σ = 46992740703552. Its totient is φ = 6713248671360.

The previous prime is 21212001011087. The next prime is 21212001011111. The reversal of 21212001011110 is 1111010021212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212001011111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11654944701 + ... + 11654946520.

It is an arithmetic number, because the mean of its divisors is an integer number (1468523146986).

Almost surely, 2^{21212001011110} is an apocalyptic number.

21212001011110 is an abundant number, since it is smaller than the sum of its proper divisors (25780739692442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21212001011110 is a wasteful number, since it uses less digits than its factorization.

21212001011110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23309891248.

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

Adding to 21212001011110 its reverse (1111010021212), we get a palindrome (22323011032322).

The spelling of 21212001011110 in words is "twenty-one trillion, two hundred twelve billion, one million, eleven thousand, one hundred ten".