212001131 has 4 divisors (see below), whose sum is σ = 213405264. Its totient is φ = 210597000.

The previous prime is 212001109. The next prime is 212001149. The reversal of 212001131 is 131100212.

212001131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212001131 is a prime.

It is a super-2 number, since 2×212001131² = 89888959090558322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212001331) 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, 701840 + ... + 702141.

It is an arithmetic number, because the mean of its divisors is an integer number (53351316).

Almost surely, 2^212001131 is an apocalyptic number.

212001131 is a deficient number, since it is larger than the sum of its proper divisors (1404133).

212001131 is a wasteful number, since it uses less digits than its factorization.

212001131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404132.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 212001131 is about 14560.2586172087. The cubic root of 212001131 is about 596.2742561262.

Adding to 212001131 its reverse (131100212), we get a palindrome (343101343).

The spelling of 212001131 in words is "two hundred twelve million, one thousand, one hundred thirty-one".