211101020231 has 2 divisors, whose sum is σ = 211101020232. Its totient is φ = 211101020230.

The previous prime is 211101020219. The next prime is 211101020239. The reversal of 211101020231 is 132020101112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211101020231 - 2¹⁸ = 211100758087 is a prime.

It is a super-2 number, since 2×211101020231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211101020239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105550510115 + 105550510116.

It is an arithmetic number, because the mean of its divisors is an integer number (105550510116).

Almost surely, 2^211101020231 is an apocalyptic number.

211101020231 is a deficient number, since it is larger than the sum of its proper divisors (1).

211101020231 is an equidigital number, since it uses as much as digits as its factorization.

211101020231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 211101020231 its reverse (132020101112), we get a palindrome (343121121343).

The spelling of 211101020231 in words is "two hundred eleven billion, one hundred one million, twenty thousand, two hundred thirty-one".