211020011031031 has 2 divisors, whose sum is σ = 211020011031032. Its totient is φ = 211020011031030.

The previous prime is 211020011031017. The next prime is 211020011031073. The reversal of 211020011031031 is 130130110020112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211020011031031 - 2⁵ = 211020011030999 is a prime.

It is a super-2 number, since 2×211020011031031² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211020011030996 and 211020011031014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211020011011031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105510005515515 + 105510005515516.

It is an arithmetic number, because the mean of its divisors is an integer number (105510005515516).

Almost surely, 2^{211020011031031} is an apocalyptic number.

211020011031031 is a deficient number, since it is larger than the sum of its proper divisors (1).

211020011031031 is an equidigital number, since it uses as much as digits as its factorization.

211020011031031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 211020011031031 its reverse (130130110020112), we get a palindrome (341150121051143).

The spelling of 211020011031031 in words is "two hundred eleven trillion, twenty billion, eleven million, thirty-one thousand, thirty-one".