20101221202003 has 2 divisors, whose sum is σ = 20101221202004. Its totient is φ = 20101221202002.

The previous prime is 20101221201917. The next prime is 20101221202043. The reversal of 20101221202003 is 30020212210102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20101221202003 is a prime.

It is not a weakly prime, because it can be changed into another prime (20101221202043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050610601001 + 10050610601002.

It is an arithmetic number, because the mean of its divisors is an integer number (10050610601002).

Almost surely, 2^{20101221202003} is an apocalyptic number.

20101221202003 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101221202003 is an equidigital number, since it uses as much as digits as its factorization.

20101221202003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20101221202003 its reverse (30020212210102), we get a palindrome (50121433412105).

The spelling of 20101221202003 in words is "twenty trillion, one hundred one billion, two hundred twenty-one million, two hundred two thousand, three".