21101122021103 has 2 divisors, whose sum is σ = 21101122021104. Its totient is φ = 21101122021102.

The previous prime is 21101122021073. The next prime is 21101122021117. The reversal of 21101122021103 is 30112022110112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21101122021103 - 2¹⁰ = 21101122020079 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21101122021303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550561010551 + 10550561010552.

It is an arithmetic number, because the mean of its divisors is an integer number (10550561010552).

Almost surely, 2^{21101122021103} is an apocalyptic number.

21101122021103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101122021103 is an equidigital number, since it uses as much as digits as its factorization.

21101122021103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21101122021103 its reverse (30112022110112), we get a palindrome (51213144131215).

The spelling of 21101122021103 in words is "twenty-one trillion, one hundred one billion, one hundred twenty-two million, twenty-one thousand, one hundred three".