21002211222122 has 16 divisors (see below), whose sum is σ = 33926739259392. Its totient is φ = 9693302438640.

The previous prime is 21002211222121. The next prime is 21002211222137. The reversal of 21002211222122 is 22122211220012.

It is a junction number, because it is equal to n+sod(n) for n = 21002211222094 and 21002211222103.

It is not an unprimeable number, because it can be changed into a prime (21002211222121) 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, 11766347 + ... + 13433217.

It is an arithmetic number, because the mean of its divisors is an integer number (2120421203712).

Almost surely, 2^{21002211222122} is an apocalyptic number.

21002211222122 is a deficient number, since it is larger than the sum of its proper divisors (12924528037270).

21002211222122 is a wasteful number, since it uses less digits than its factorization.

21002211222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151493.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21002211222122 its reverse (22122211220012), we get a palindrome (43124422442134).

The spelling of 21002211222122 in words is "twenty-one trillion, two billion, two hundred eleven million, two hundred twenty-two thousand, one hundred twenty-two".