20110121102411 has 2 divisors, whose sum is σ = 20110121102412. Its totient is φ = 20110121102410.

The previous prime is 20110121102381. The next prime is 20110121102437. The reversal of 20110121102411 is 11420112101102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20110121102411 - 2⁶ = 20110121102347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20110121102411.

It is not a weakly prime, because it can be changed into another prime (20110126102411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055060551205 + 10055060551206.

It is an arithmetic number, because the mean of its divisors is an integer number (10055060551206).

Almost surely, 2^{20110121102411} is an apocalyptic number.

20110121102411 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110121102411 is an equidigital number, since it uses as much as digits as its factorization.

20110121102411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 20110121102411 its reverse (11420112101102), we get a palindrome (31530233203513).

The spelling of 20110121102411 in words is "twenty trillion, one hundred ten billion, one hundred twenty-one million, one hundred two thousand, four hundred eleven".