1021011212011 has 4 divisors (see below), whose sum is σ = 1166869956592. Its totient is φ = 875152467432.

The previous prime is 1021011211999. The next prime is 1021011212027. The reversal of 1021011212011 is 1102121101201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021011212011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021011211982 and 1021011212000.

It is not an unprimeable number, because it can be changed into a prime (1021011216011) 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 3 ways as a sum of consecutive naturals, for example, 72929372280 + ... + 72929372293.

It is an arithmetic number, because the mean of its divisors is an integer number (291717489148).

Almost surely, 2^{1021011212011} is an apocalyptic number.

1021011212011 is a deficient number, since it is larger than the sum of its proper divisors (145858744581).

1021011212011 is an equidigital number, since it uses as much as digits as its factorization.

1021011212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145858744580.

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

Adding to 1021011212011 its reverse (1102121101201), we get a palindrome (2123132313212).

The spelling of 1021011212011 in words is "one trillion, twenty-one billion, eleven million, two hundred twelve thousand, eleven".