20120102110111 has 2 divisors, whose sum is σ = 20120102110112. Its totient is φ = 20120102110110.

The previous prime is 20120102110079. The next prime is 20120102110117. The reversal of 20120102110111 is 11101120102102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20120102110111 - 2⁵ = 20120102110079 is a prime.

It is a super-2 number, since 2×20120102110111² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20120102110091 and 20120102110100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20120102110117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060051055055 + 10060051055056.

It is an arithmetic number, because the mean of its divisors is an integer number (10060051055056).

Almost surely, 2^{20120102110111} is an apocalyptic number.

20120102110111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120102110111 is an equidigital number, since it uses as much as digits as its factorization.

20120102110111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20120102110111 its reverse (11101120102102), we get a palindrome (31221222212213).

The spelling of 20120102110111 in words is "twenty trillion, one hundred twenty billion, one hundred two million, one hundred ten thousand, one hundred eleven".