21020200220222 has 16 divisors (see below), whose sum is σ = 36041177260032. Its totient is φ = 9007020159480.

The previous prime is 21020200220221. The next prime is 21020200220231. The reversal of 21020200220222 is 22202200202012.

It is a self number, because there is not a number n which added to its sum of digits gives 21020200220222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020200220221) 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, 136343354 + ... + 136497437.

It is an arithmetic number, because the mean of its divisors is an integer number (2252573578752).

Almost surely, 2^{21020200220222} is an apocalyptic number.

21020200220222 is a deficient number, since it is larger than the sum of its proper divisors (15020977039810).

21020200220222 is a wasteful number, since it uses less digits than its factorization.

21020200220222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272846303.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 21020200220222 its reverse (22202200202012), we get a palindrome (43222400422234).

The spelling of 21020200220222 in words is "twenty-one trillion, twenty billion, two hundred million, two hundred twenty thousand, two hundred twenty-two".