2212122012021 has 12 divisors (see below), whose sum is σ = 3195482196972. Its totient is φ = 1474658078976.

The previous prime is 2212122012007. The next prime is 2212122012041. The reversal of 2212122012021 is 1202102212122.

It is a happy number.

2212122012021 is a `hidden beast` number, since 221 + 21 + 220 + 1 + 202 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 682423035921 + 1529698976100 = 826089^2 + 1236810^2 .

It is not a de Polignac number, because 2212122012021 - 2¹¹ = 2212122009973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2212122011985 and 2212122012003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212122012041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7338126 + ... + 7633631.

It is an arithmetic number, because the mean of its divisors is an integer number (266290183081).

Almost surely, 2^{2212122012021} is an apocalyptic number.

It is an amenable number.

2212122012021 is a deficient number, since it is larger than the sum of its proper divisors (983360184951).

2212122012021 is a wasteful number, since it uses less digits than its factorization.

2212122012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14988180 (or 14988177 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2212122012021 its reverse (1202102212122), we get a palindrome (3414224224143).

The spelling of 2212122012021 in words is "two trillion, two hundred twelve billion, one hundred twenty-two million, twelve thousand, twenty-one".