21221020011014 has 4 divisors (see below), whose sum is σ = 31831530016524. Its totient is φ = 10610510005506.

The previous prime is 21221020011013. The next prime is 21221020011017. The reversal of 21221020011014 is 41011002012212.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21221020010983 and 21221020011001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221020011013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5305255002752 + ... + 5305255002755.

It is an arithmetic number, because the mean of its divisors is an integer number (7957882504131).

Almost surely, 2^{21221020011014} is an apocalyptic number.

21221020011014 is a deficient number, since it is larger than the sum of its proper divisors (10610510005510).

21221020011014 is a wasteful number, since it uses less digits than its factorization.

21221020011014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10610510005509.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21221020011014 its reverse (41011002012212), we get a palindrome (62232022023226).

The spelling of 21221020011014 in words is "twenty-one trillion, two hundred twenty-one billion, twenty million, eleven thousand, fourteen".