21012213440222 has 16 divisors (see below), whose sum is σ = 33242360245200. Its totient is φ = 9933599396160.

The previous prime is 21012213440173. The next prime is 21012213440249. The reversal of 21012213440222 is 22204431221012.

It is a happy number.

It is a super-2 number, since 2×21012213440222² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21012213440191 and 21012213440200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 543156479 + ... + 543195162.

It is an arithmetic number, because the mean of its divisors is an integer number (2077647515325).

Almost surely, 2^{21012213440222} is an apocalyptic number.

21012213440222 is a deficient number, since it is larger than the sum of its proper divisors (12230146804978).

21012213440222 is a wasteful number, since it uses less digits than its factorization.

21012213440222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086352171.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 21012213440222 its reverse (22204431221012), we get a palindrome (43216644661234).

The spelling of 21012213440222 in words is "twenty-one trillion, twelve billion, two hundred thirteen million, four hundred forty thousand, two hundred twenty-two".