21213222223020 has 48 divisors (see below), whose sum is σ = 60283544955648. Its totient is φ = 5572428523200.

The previous prime is 21213222223013. The next prime is 21213222223027. The reversal of 21213222223020 is 2032222231212.

It is an interprime number because it is at equal distance from previous prime (21213222223013) and next prime (21213222223027).

It is not an unprimeable number, because it can be changed into a prime (21213222223027) 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, 2638456456 + ... + 2638464495.

It is an arithmetic number, because the mean of its divisors is an integer number (1255907186576).

Almost surely, 2^{21213222223020} is an apocalyptic number.

21213222223020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21213222223020 is an abundant number, since it is smaller than the sum of its proper divisors (39070322732628).

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

21213222223020 is a wasteful number, since it uses less digits than its factorization.

21213222223020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5276921030 (or 5276921028 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21213222223020 its reverse (2032222231212), we get a palindrome (23245444454232).

The spelling of 21213222223020 in words is "twenty-one trillion, two hundred thirteen billion, two hundred twenty-two million, two hundred twenty-three thousand, twenty".