21212001010103 has 2 divisors, whose sum is σ = 21212001010104. Its totient is φ = 21212001010102.

The previous prime is 21212001010073. The next prime is 21212001010111. The reversal of 21212001010103 is 30101010021212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21212001010103 - 2²² = 21211996815799 is a prime.

It is a super-2 number, since 2×21212001010103² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21212001010133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606000505051 + 10606000505052.

It is an arithmetic number, because the mean of its divisors is an integer number (10606000505052).

Almost surely, 2^{21212001010103} is an apocalyptic number.

21212001010103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212001010103 is an equidigital number, since it uses as much as digits as its factorization.

21212001010103 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 14.

Adding to 21212001010103 its reverse (30101010021212), we get a palindrome (51313011031315).

The spelling of 21212001010103 in words is "twenty-one trillion, two hundred twelve billion, one million, ten thousand, one hundred three".