21221021001110 has 32 divisors (see below), whose sum is σ = 44583494584320. Its totient is φ = 7120974827232.

The previous prime is 21221021001101. The next prime is 21221021001113. The reversal of 21221021001110 is 1110012012212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221021001113) 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, 3225075890 + ... + 3225082469.

It is an arithmetic number, because the mean of its divisors is an integer number (1393234205760).

Almost surely, 2^{21221021001110} is an apocalyptic number.

21221021001110 is an abundant number, since it is smaller than the sum of its proper divisors (23362473583210).

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

21221021001110 is a wasteful number, since it uses less digits than its factorization.

21221021001110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6450158420.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21221021001110 its reverse (1110012012212), we get a palindrome (22331033013322).

The spelling of 21221021001110 in words is "twenty-one trillion, two hundred twenty-one billion, twenty-one million, one thousand, one hundred ten".