221210211007 has 2 divisors, whose sum is σ = 221210211008. Its totient is φ = 221210211006.

The previous prime is 221210210989. The next prime is 221210211023. The reversal of 221210211007 is 700112012122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221210211007 is a prime.

It is a super-2 number, since 2×221210211007² (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 (221210211067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605105503 + 110605105504.

It is an arithmetic number, because the mean of its divisors is an integer number (110605105504).

Almost surely, 2^221210211007 is an apocalyptic number.

221210211007 is a deficient number, since it is larger than the sum of its proper divisors (1).

221210211007 is an equidigital number, since it uses as much as digits as its factorization.

221210211007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 221210211007 its reverse (700112012122), we get a palindrome (921322223129).

The spelling of 221210211007 in words is "two hundred twenty-one billion, two hundred ten million, two hundred eleven thousand, seven".