212120130331 has 4 divisors (see below), whose sum is σ = 212122703992. Its totient is φ = 212117556672.

The previous prime is 212120130329. The next prime is 212120130401. The reversal of 212120130331 is 133031021212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212120130331 - 2¹ = 212120130329 is a prime.

It is a super-2 number, since 2×212120130331² (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 = 212120130299 and 212120130308.

It is not an unprimeable number, because it can be changed into a prime (212120130311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1158966 + ... + 1329451.

It is an arithmetic number, because the mean of its divisors is an integer number (53030675998).

Almost surely, 2^212120130331 is an apocalyptic number.

212120130331 is a deficient number, since it is larger than the sum of its proper divisors (2573661).

212120130331 is an equidigital number, since it uses as much as digits as its factorization.

212120130331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2573660.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 212120130331 its reverse (133031021212), we get a palindrome (345151151543).

The spelling of 212120130331 in words is "two hundred twelve billion, one hundred twenty million, one hundred thirty thousand, three hundred thirty-one".