1210211021011 has 2 divisors, whose sum is σ = 1210211021012. Its totient is φ = 1210211021010.

The previous prime is 1210211021009. The next prime is 1210211021023. The reversal of 1210211021011 is 1101201120121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1210211021011 - 2¹ = 1210211021009 is a prime.

It is a super-2 number, since 2×1210211021011² (a number of 25 digits) contains 22 as substring.

Together with 1210211021009, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1210211020982 and 1210211021000.

It is not a weakly prime, because it can be changed into another prime (1210211021611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605105510505 + 605105510506.

It is an arithmetic number, because the mean of its divisors is an integer number (605105510506).

Almost surely, 2^{1210211021011} is an apocalyptic number.

1210211021011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210211021011 is an equidigital number, since it uses as much as digits as its factorization.

1210211021011 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 1210211021011 its reverse (1101201120121), we get a palindrome (2311412141132).

The spelling of 1210211021011 in words is "one trillion, two hundred ten billion, two hundred eleven million, twenty-one thousand, eleven".