212021121033 has 18 divisors (see below), whose sum is σ = 325327298894. Its totient is φ = 133032858624.

The previous prime is 212021121001. The next prime is 212021121047. The reversal of 212021121033 is 330121120212.

212021121033 is a `hidden beast` number, since 212 + 0 + 211 + 210 + 33 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 98011572624 + 114009548409 = 313068^2 + 337653^2 .

It is not a de Polignac number, because 212021121033 - 2⁵ = 212021121001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212021120997 and 212021121015.

It is not an unprimeable number, because it can be changed into a prime (212021121833) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 40755016 + ... + 40760217.

Almost surely, 2^212021121033 is an apocalyptic number.

It is an amenable number.

212021121033 is a deficient number, since it is larger than the sum of its proper divisors (113306177861).

212021121033 is a wasteful number, since it uses less digits than its factorization.

212021121033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81515273 (or 81515253 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 212021121033 its reverse (330121120212), we get a palindrome (542142241245).

The spelling of 212021121033 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-one thousand, thirty-three".