21020221211122 has 32 divisors (see below), whose sum is σ = 36082581800832. Its totient is φ = 8996692927104.

The previous prime is 21020221211117. The next prime is 21020221211149. The reversal of 21020221211122 is 22111212202012.

It is a super-3 number, since 3×21020221211122³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21020221211122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42788278 + ... + 43276750.

It is an arithmetic number, because the mean of its divisors is an integer number (1127580681276).

Almost surely, 2^{21020221211122} is an apocalyptic number.

21020221211122 is a deficient number, since it is larger than the sum of its proper divisors (15062360589710).

21020221211122 is a wasteful number, since it uses less digits than its factorization.

21020221211122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492562.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21020221211122 its reverse (22111212202012), we get a palindrome (43131433413134).

The spelling of 21020221211122 in words is "twenty-one trillion, twenty billion, two hundred twenty-one million, two hundred eleven thousand, one hundred twenty-two".