1021212302111 has 2 divisors, whose sum is σ = 1021212302112. Its totient is φ = 1021212302110.

The previous prime is 1021212302101. The next prime is 1021212302183. The reversal of 1021212302111 is 1112032121201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021212302111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021212302111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021212302101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510606151055 + 510606151056.

It is an arithmetic number, because the mean of its divisors is an integer number (510606151056).

Almost surely, 2^{1021212302111} is an apocalyptic number.

1021212302111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021212302111 is an equidigital number, since it uses as much as digits as its factorization.

1021212302111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1021212302111 its reverse (1112032121201), we get a palindrome (2133244423312).

The spelling of 1021212302111 in words is "one trillion, twenty-one billion, two hundred twelve million, three hundred two thousand, one hundred eleven".