212121101020122 has 48 divisors (see below), whose sum is σ = 525253280834880. Its totient is φ = 60605909937216.

The previous prime is 212121101020067. The next prime is 212121101020133. The reversal of 212121101020122 is 221020101121212.

It is a super-3 number, since 3×212121101020122³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212121101020095 and 212121101020104.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77993793 + ... + 80667675.

It is an arithmetic number, because the mean of its divisors is an integer number (10942776684060).

Almost surely, 2^{212121101020122} is an apocalyptic number.

212121101020122 is an abundant number, since it is smaller than the sum of its proper divisors (313132179814758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212121101020122 is a wasteful number, since it uses less digits than its factorization.

212121101020122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3303507 (or 3303504 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 212121101020122 its reverse (221020101121212), we get a palindrome (433141202141334).

The spelling of 212121101020122 in words is "two hundred twelve trillion, one hundred twenty-one billion, one hundred one million, twenty thousand, one hundred twenty-two".