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212312101 is a prime number
BaseRepresentation
bin11001010011110…
…10000000100101
3112210111120110011
430221322000211
5413322441401
633022330221
75155423501
oct1451720045
9483446404
10212312101
11a9932251
125b129971
1334ca8381
14202a9301
151398c451
hexca7a025

212312101 has 2 divisors, whose sum is σ = 212312102. Its totient is φ = 212312100.

The previous prime is 212312071. The next prime is 212312119. The reversal of 212312101 is 101213212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207792225 + 4519876 = 14415^2 + 2126^2 .

It is a cyclic number.

It is not a de Polignac number, because 212312101 - 211 = 212310053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212312141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106156050 + 106156051.

It is an arithmetic number, because the mean of its divisors is an integer number (106156051).

Almost surely, 2212312101 is an apocalyptic number.

It is an amenable number.

212312101 is a deficient number, since it is larger than the sum of its proper divisors (1).

212312101 is an equidigital number, since it uses as much as digits as its factorization.

212312101 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 13.

The square root of 212312101 is about 14570.9334292625. The cubic root of 212312101 is about 596.5656583729.

Adding to 212312101 its reverse (101213212), we get a palindrome (313525313).

It can be divided in two parts, 21231 and 2101, that added together give a palindrome (23332).

The spelling of 212312101 in words is "two hundred twelve million, three hundred twelve thousand, one hundred one".