210220011212111 has 2 divisors, whose sum is σ = 210220011212112. Its totient is φ = 210220011212110.

The previous prime is 210220011212093. The next prime is 210220011212131. The reversal of 210220011212111 is 111212110022012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 210220011212111 - 2²² = 210220007017807 is a prime.

It is a super-2 number, since 2×210220011212111² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210220011212111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210220011212131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110005606055 + 105110005606056.

It is an arithmetic number, because the mean of its divisors is an integer number (105110005606056).

Almost surely, 2^{210220011212111} is an apocalyptic number.

210220011212111 is a deficient number, since it is larger than the sum of its proper divisors (1).

210220011212111 is an equidigital number, since it uses as much as digits as its factorization.

210220011212111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 210220011212111 its reverse (111212110022012), we get a palindrome (321432121234123).

The spelling of 210220011212111 in words is "two hundred ten trillion, two hundred twenty billion, eleven million, two hundred twelve thousand, one hundred eleven".