21022002102220 has 48 divisors (see below), whose sum is σ = 50486872258368. Its totient is φ = 7202676833280.

The previous prime is 21022002102107. The next prime is 21022002102259. The reversal of 21022002102220 is 2220120022012.

It is a junction number, because it is equal to n+sod(n) for n = 21022002102194 and 21022002102203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50487177 + ... + 50901856.

It is an arithmetic number, because the mean of its divisors is an integer number (1051809838716).

Almost surely, 2^{21022002102220} is an apocalyptic number.

21022002102220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022002102220 is an abundant number, since it is smaller than the sum of its proper divisors (29464870156148).

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

21022002102220 is a wasteful number, since it uses less digits than its factorization.

21022002102220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101390530 (or 101390528 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21022002102220 its reverse (2220120022012), we get a palindrome (23242122124232).

The spelling of 21022002102220 in words is "twenty-one trillion, twenty-two billion, two million, one hundred two thousand, two hundred twenty".