21223021102213 has 8 divisors (see below), whose sum is σ = 24749878836800. Its totient is φ = 18191160944460.

The previous prime is 21223021102211. The next prime is 21223021102219. The reversal of 21223021102213 is 31220112032212.

It is not a de Polignac number, because 21223021102213 - 2¹ = 21223021102211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223021102211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30937348203 + ... + 30937348888.

It is an arithmetic number, because the mean of its divisors is an integer number (3093734854600).

Almost surely, 2^{21223021102213} is an apocalyptic number.

It is an amenable number.

21223021102213 is a deficient number, since it is larger than the sum of its proper divisors (3526857734587).

21223021102213 is an frugal number, since it uses more digits than its factorization.

21223021102213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61874697112 (or 61874697098 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21223021102213 its reverse (31220112032212), we get a palindrome (52443133134425).

The spelling of 21223021102213 in words is "twenty-one trillion, two hundred twenty-three billion, twenty-one million, one hundred two thousand, two hundred thirteen".