21221221110022 has 8 divisors (see below), whose sum is σ = 31831873462872. Its totient is φ = 10610596622400.

The previous prime is 21221221110007. The next prime is 21221221110029. The reversal of 21221221110022 is 22001112212212.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221221110029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4945104 + ... + 8179027.

It is an arithmetic number, because the mean of its divisors is an integer number (3978984182859).

Almost surely, 2^{21221221110022} is an apocalyptic number.

21221221110022 is a deficient number, since it is larger than the sum of its proper divisors (10610652352850).

21221221110022 is a wasteful number, since it uses less digits than its factorization.

21221221110022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13932614.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21221221110022 its reverse (22001112212212), we get a palindrome (43222333322234).

The spelling of 21221221110022 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred ten thousand, twenty-two".