21132221102122 has 8 divisors (see below), whose sum is σ = 34136664857316. Its totient is φ = 9753332816352.

The previous prime is 21132221102093. The next prime is 21132221102143. The reversal of 21132221102122 is 22120112223112.

It can be written as a sum of positive squares in 2 ways, for example, as 16664201716761 + 4468019385361 = 4082181^2 + 2113769^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21132221102093 and 21132221102102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406388867323 + ... + 406388867374.

Almost surely, 2^{21132221102122} is an apocalyptic number.

21132221102122 is a deficient number, since it is larger than the sum of its proper divisors (13004443755194).

21132221102122 is a wasteful number, since it uses less digits than its factorization.

21132221102122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812777734712.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 21132221102122 its reverse (22120112223112), we get a palindrome (43252333325234).

The spelling of 21132221102122 in words is "twenty-one trillion, one hundred thirty-two billion, two hundred twenty-one million, one hundred two thousand, one hundred twenty-two".