1021210011111 has 8 divisors (see below), whose sum is σ = 1368525091824. Its totient is φ = 677350802240.

The previous prime is 1021210011089. The next prime is 1021210011121. The reversal of 1021210011111 is 1111100121201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021210011111 - 2⁶ = 1021210011047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021210011121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 863967270 + ... + 863968451.

It is an arithmetic number, because the mean of its divisors is an integer number (171065636478).

Almost surely, 2^{1021210011111} is an apocalyptic number.

1021210011111 is a deficient number, since it is larger than the sum of its proper divisors (347315080713).

1021210011111 is a wasteful number, since it uses less digits than its factorization.

1021210011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727935921.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1021210011111 its reverse (1111100121201), we get a palindrome (2132310132312).

The spelling of 1021210011111 in words is "one trillion, twenty-one billion, two hundred ten million, eleven thousand, one hundred eleven".