21021111101203 has 2 divisors, whose sum is σ = 21021111101204. Its totient is φ = 21021111101202.

The previous prime is 21021111101093. The next prime is 21021111101239. The reversal of 21021111101203 is 30210111112012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21021111101203 - 2²⁵ = 21021077546771 is a prime.

It is a super-2 number, since 2×21021111101203² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21021111141203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510555550601 + 10510555550602.

It is an arithmetic number, because the mean of its divisors is an integer number (10510555550602).

Almost surely, 2^{21021111101203} is an apocalyptic number.

21021111101203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21021111101203 is an equidigital number, since it uses as much as digits as its factorization.

21021111101203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 21021111101203 its reverse (30210111112012), we get a palindrome (51231222213215).

The spelling of 21021111101203 in words is "twenty-one trillion, twenty-one billion, one hundred eleven million, one hundred one thousand, two hundred three".