21321033312122 has 16 divisors (see below), whose sum is σ = 31994200300392. Its totient is φ = 10656300564480.

The previous prime is 21321033312071. The next prime is 21321033312223. The reversal of 21321033312122 is 22121333012312.

It can be written as a sum of positive squares in 4 ways, for example, as 18162419304121 + 3158614008001 = 4261739^2 + 1777249^2 .

It is a super-2 number, since 2×21321033312122² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21321033312091 and 21321033312100.

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, 64396922 + ... + 64727162.

Almost surely, 2^{21321033312122} is an apocalyptic number.

21321033312122 is a deficient number, since it is larger than the sum of its proper divisors (10673166988270).

21321033312122 is a wasteful number, since it uses less digits than its factorization.

21321033312122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342913.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 21321033312122 its reverse (22121333012312), we get a palindrome (43442366324434).

The spelling of 21321033312122 in words is "twenty-one trillion, three hundred twenty-one billion, thirty-three million, three hundred twelve thousand, one hundred twenty-two".