21101002021222 has 16 divisors (see below), whose sum is σ = 31722064814880. Its totient is φ = 10527004755072.

The previous prime is 21101002021139. The next prime is 21101002021223. The reversal of 21101002021222 is 22212020010112.

It is a happy number.

It is a super-2 number, since 2×21101002021222² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21101002021196 and 21101002021205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101002021223) 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, 4349523 + ... + 7817950.

It is an arithmetic number, because the mean of its divisors is an integer number (1982629050930).

Almost surely, 2^{21101002021222} is an apocalyptic number.

21101002021222 is a deficient number, since it is larger than the sum of its proper divisors (10621062793658).

21101002021222 is a wasteful number, since it uses less digits than its factorization.

21101002021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12169407.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21101002021222 its reverse (22212020010112), we get a palindrome (43313022031334).

The spelling of 21101002021222 in words is "twenty-one trillion, one hundred one billion, two million, twenty-one thousand, two hundred twenty-two".