1021200122011 has 2 divisors, whose sum is σ = 1021200122012. Its totient is φ = 1021200122010.

The previous prime is 1021200121999. The next prime is 1021200122083. The reversal of 1021200122011 is 1102210021201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021200122011 - 2⁷ = 1021200121883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021200121982 and 1021200122000.

It is not a weakly prime, because it can be changed into another prime (1021200122611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510600061005 + 510600061006.

It is an arithmetic number, because the mean of its divisors is an integer number (510600061006).

Almost surely, 2^{1021200122011} is an apocalyptic number.

1021200122011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021200122011 is an equidigital number, since it uses as much as digits as its factorization.

1021200122011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1021200122011 its reverse (1102210021201), we get a palindrome (2123410143212).

The spelling of 1021200122011 in words is "one trillion, twenty-one billion, two hundred million, one hundred twenty-two thousand, eleven".