212020331121 has 6 divisors (see below), whose sum is σ = 306251589410. Its totient is φ = 141346887408.

The previous prime is 212020331119. The next prime is 212020331153. The reversal of 212020331121 is 121133020212.

212020331121 is a `hidden beast` number, since 212 + 0 + 2 + 0 + 331 + 121 = 666.

It can be written as a sum of positive squares in only one way, i.e., 196505137521 + 15515193600 = 443289^2 + 124560^2 .

It is not a de Polignac number, because 212020331121 - 2¹ = 212020331119 is a prime.

It is a super-2 number, since 2×212020331121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212020331094 and 212020331103.

It is not an unprimeable number, because it can be changed into a prime (212020331101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11778907276 + ... + 11778907293.

Almost surely, 2^212020331121 is an apocalyptic number.

It is an amenable number.

212020331121 is a deficient number, since it is larger than the sum of its proper divisors (94231258289).

212020331121 is a wasteful number, since it uses less digits than its factorization.

212020331121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23557814575 (or 23557814572 counting only the distinct ones).

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

Adding to 212020331121 its reverse (121133020212), we get a palindrome (333153351333).

The spelling of 212020331121 in words is "two hundred twelve billion, twenty million, three hundred thirty-one thousand, one hundred twenty-one".