1021122101211 has 4 divisors (see below), whose sum is σ = 1361496134952. Its totient is φ = 680748067472.

The previous prime is 1021122101117. The next prime is 1021122101249. The reversal of 1021122101211 is 1121012211201.

It is a happy number.

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 1021122101211 - 2¹⁵ = 1021122068443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021122101011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170187016866 + ... + 170187016871.

It is an arithmetic number, because the mean of its divisors is an integer number (340374033738).

Almost surely, 2^{1021122101211} is an apocalyptic number.

1021122101211 is a deficient number, since it is larger than the sum of its proper divisors (340374033741).

1021122101211 is an equidigital number, since it uses as much as digits as its factorization.

1021122101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340374033740.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1021122101211 its reverse (1121012211201), we get a palindrome (2142134312412).

The spelling of 1021122101211 in words is "one trillion, twenty-one billion, one hundred twenty-two million, one hundred one thousand, two hundred eleven".