1021212122011 has 4 divisors (see below), whose sum is σ = 1024105074552. Its totient is φ = 1018319169472.

The previous prime is 1021212122003. The next prime is 1021212122033. The reversal of 1021212122011 is 1102212121201.

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

It is a cyclic number.

It is not a de Polignac number, because 1021212122011 - 2³ = 1021212122003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021212122041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1446475741 + ... + 1446476446.

It is an arithmetic number, because the mean of its divisors is an integer number (256026268638).

Almost surely, 2^{1021212122011} is an apocalyptic number.

1021212122011 is a deficient number, since it is larger than the sum of its proper divisors (2892952541).

1021212122011 is an equidigital number, since it uses as much as digits as its factorization.

1021212122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2892952540.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1021212122011 its reverse (1102212121201), we get a palindrome (2123424243212).

The spelling of 1021212122011 in words is "one trillion, twenty-one billion, two hundred twelve million, one hundred twenty-two thousand, eleven".