212020031191 has 4 divisors (see below), whose sum is σ = 216020409192. Its totient is φ = 208019653192.

The previous prime is 212020031189. The next prime is 212020031203. The reversal of 212020031191 is 191130020212.

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 212020031191 - 2¹ = 212020031189 is a prime.

It is a super-2 number, since 2×212020031191² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212020001191) 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, 2000188921 + ... + 2000189026.

It is an arithmetic number, because the mean of its divisors is an integer number (54005102298).

Almost surely, 2^212020031191 is an apocalyptic number.

212020031191 is a deficient number, since it is larger than the sum of its proper divisors (4000378001).

212020031191 is an equidigital number, since it uses as much as digits as its factorization.

212020031191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4000378000.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 212020031191 in words is "two hundred twelve billion, twenty million, thirty-one thousand, one hundred ninety-one".