20100021202111 has 2 divisors, whose sum is σ = 20100021202112. Its totient is φ = 20100021202110.

The previous prime is 20100021202043. The next prime is 20100021202133. The reversal of 20100021202111 is 11120212000102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20100021202111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20100021202091 and 20100021202100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20100021202211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050010601055 + 10050010601056.

It is an arithmetic number, because the mean of its divisors is an integer number (10050010601056).

Almost surely, 2^{20100021202111} is an apocalyptic number.

20100021202111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100021202111 is an equidigital number, since it uses as much as digits as its factorization.

20100021202111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20100021202111 its reverse (11120212000102), we get a palindrome (31220233202213).

The spelling of 20100021202111 in words is "twenty trillion, one hundred billion, twenty-one million, two hundred two thousand, one hundred eleven".