21010222202222 has 96 divisors (see below), whose sum is σ = 36400817784960. Its totient is φ = 9018649823040.

The previous prime is 21010222202171. The next prime is 21010222202261. The reversal of 21010222202222 is 22220222201012.

It is a junction number, because it is equal to n+sod(n) for n = 21010222202194 and 21010222202203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5133206408 + ... + 5133210500.

It is an arithmetic number, because the mean of its divisors is an integer number (379175185260).

Almost surely, 2^{21010222202222} is an apocalyptic number.

21010222202222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21010222202222 is a deficient number, since it is larger than the sum of its proper divisors (15390595582738).

21010222202222 is a wasteful number, since it uses less digits than its factorization.

21010222202222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6046 (or 6027 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21010222202222 its reverse (22220222201012), we get a palindrome (43230444403234).

The spelling of 21010222202222 in words is "twenty-one trillion, ten billion, two hundred twenty-two million, two hundred two thousand, two hundred twenty-two".