21010213002220 has 24 divisors (see below), whose sum is σ = 47515404790224. Its totient is φ = 7757617108416.

The previous prime is 21010213002203. The next prime is 21010213002271. The reversal of 21010213002220 is 2220031201012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21010213002194 and 21010213002203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40404255514 + ... + 40404256033.

It is an arithmetic number, because the mean of its divisors is an integer number (1979808532926).

Almost surely, 2^{21010213002220} is an apocalyptic number.

21010213002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010213002220 is an abundant number, since it is smaller than the sum of its proper divisors (26505191788004).

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

21010213002220 is a wasteful number, since it uses less digits than its factorization.

21010213002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80808511569 (or 80808511567 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21010213002220 its reverse (2220031201012), we get a palindrome (23230244203232).

The spelling of 21010213002220 in words is "twenty-one trillion, ten billion, two hundred thirteen million, two thousand, two hundred twenty".