212140043031 has 16 divisors (see below), whose sum is σ = 331145434368. Its totient is φ = 118266225600.

The previous prime is 212140042993. The next prime is 212140043057. The reversal of 212140043031 is 130340041212.

It is not a de Polignac number, because 212140043031 - 2¹⁵ = 212140010263 is a prime.

It is a super-2 number, since 2×212140043031² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 212140042989 and 212140043007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212140043081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123193125 + ... + 123194846.

It is an arithmetic number, because the mean of its divisors is an integer number (20696589648).

Almost surely, 2^212140043031 is an apocalyptic number.

212140043031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

212140043031 is a deficient number, since it is larger than the sum of its proper divisors (119005391337).

212140043031 is a wasteful number, since it uses less digits than its factorization.

212140043031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246388022.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 212140043031 its reverse (130340041212), we get a palindrome (342480084243).

The spelling of 212140043031 in words is "two hundred twelve billion, one hundred forty million, forty-three thousand, thirty-one".