1021211002111 has 2 divisors, whose sum is σ = 1021211002112. Its totient is φ = 1021211002110.

The previous prime is 1021211002103. The next prime is 1021211002129. The reversal of 1021211002111 is 1112001121201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021211002111 - 2³ = 1021211002103 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021211002091 and 1021211002100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021211002171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510605501055 + 510605501056.

It is an arithmetic number, because the mean of its divisors is an integer number (510605501056).

Almost surely, 2^{1021211002111} is an apocalyptic number.

1021211002111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021211002111 is an equidigital number, since it uses as much as digits as its factorization.

1021211002111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1021211002111 its reverse (1112001121201), we get a palindrome (2133212123312).

The spelling of 1021211002111 in words is "one trillion, twenty-one billion, two hundred eleven million, two thousand, one hundred eleven".