210121101011 has 2 divisors, whose sum is σ = 210121101012. Its totient is φ = 210121101010.

The previous prime is 210121100977. The next prime is 210121101013. The reversal of 210121101011 is 110101121012.

210121101011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210121101011 - 2²² = 210116906707 is a prime.

Together with 210121101013, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 210121100983 and 210121101001.

It is not a weakly prime, because it can be changed into another prime (210121101013) 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, 105060550505 + 105060550506.

It is an arithmetic number, because the mean of its divisors is an integer number (105060550506).

Almost surely, 2^210121101011 is an apocalyptic number.

210121101011 is a deficient number, since it is larger than the sum of its proper divisors (1).

210121101011 is an equidigital number, since it uses as much as digits as its factorization.

210121101011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 210121101011 its reverse (110101121012), we get a palindrome (320222222023).

It can be divided in two parts, 21012 and 1101011, that multiplied together give a palindrome (23134443132).

The spelling of 210121101011 in words is "two hundred ten billion, one hundred twenty-one million, one hundred one thousand, eleven".