212011021121 has 8 divisors (see below), whose sum is σ = 214163433000. Its totient is φ = 209859654400.

The previous prime is 212011021097. The next prime is 212011021127. The reversal of 212011021121 is 121120110212.

It can be written as a sum of positive squares in 4 ways, for example, as 26801291521 + 185209729600 = 163711^2 + 430360^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 212011021121 - 2³⁴ = 194831151937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212011021096 and 212011021105.

It is not an unprimeable number, because it can be changed into a prime (212011021127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149735 + ... + 668163.

It is an arithmetic number, because the mean of its divisors is an integer number (26770429125).

Almost surely, 2^212011021121 is an apocalyptic number.

It is an amenable number.

212011021121 is a deficient number, since it is larger than the sum of its proper divisors (2152411879).

212011021121 is a wasteful number, since it uses less digits than its factorization.

212011021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522579.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212011021121 its reverse (121120110212), we get a palindrome (333131131333).

The spelling of 212011021121 in words is "two hundred twelve billion, eleven million, twenty-one thousand, one hundred twenty-one".