212021103031 has 2 divisors, whose sum is σ = 212021103032. Its totient is φ = 212021103030.

The previous prime is 212021103029. The next prime is 212021103127. The reversal of 212021103031 is 130301120212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212021103031 - 2¹ = 212021103029 is a prime.

It is a super-2 number, since 2×212021103031² (a number of 23 digits) contains 22 as substring.

Together with 212021103029, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 212021102996 and 212021103014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212021403031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010551515 + 106010551516.

It is an arithmetic number, because the mean of its divisors is an integer number (106010551516).

Almost surely, 2^212021103031 is an apocalyptic number.

212021103031 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021103031 is an equidigital number, since it uses as much as digits as its factorization.

212021103031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 212021103031 its reverse (130301120212), we get a palindrome (342322223243).

The spelling of 212021103031 in words is "two hundred twelve billion, twenty-one million, one hundred three thousand, thirty-one".