212002111121 has 2 divisors, whose sum is σ = 212002111122. Its totient is φ = 212002111120.

The previous prime is 212002111109. The next prime is 212002111151. The reversal of 212002111121 is 121111200212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212001310096 + 801025 = 460436^2 + 895^2 .

It is a cyclic number.

It is not a de Polignac number, because 212002111121 - 2²² = 211997916817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212002111096 and 212002111105.

It is not a weakly prime, because it can be changed into another prime (212002111151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106001055560 + 106001055561.

It is an arithmetic number, because the mean of its divisors is an integer number (106001055561).

Almost surely, 2^212002111121 is an apocalyptic number.

It is an amenable number.

212002111121 is a deficient number, since it is larger than the sum of its proper divisors (1).

212002111121 is an equidigital number, since it uses as much as digits as its factorization.

212002111121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212002111121 its reverse (121111200212), we get a palindrome (333113311333).

The spelling of 212002111121 in words is "two hundred twelve billion, two million, one hundred eleven thousand, one hundred twenty-one".