111021200020111 has 2 divisors, whose sum is σ = 111021200020112. Its totient is φ = 111021200020110.

The previous prime is 111021200019979. The next prime is 111021200020163. The reversal of 111021200020111 is 111020002120111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111021200020111 - 2²³ = 111021191631503 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111021200020091 and 111021200020100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111021200029111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510600010055 + 55510600010056.

It is an arithmetic number, because the mean of its divisors is an integer number (55510600010056).

Almost surely, 2^{111021200020111} is an apocalyptic number.

111021200020111 is a deficient number, since it is larger than the sum of its proper divisors (1).

111021200020111 is an equidigital number, since it uses as much as digits as its factorization.

111021200020111 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 111021200020111 its reverse (111020002120111), we get a palindrome (222041202140222).

The spelling of 111021200020111 in words is "one hundred eleven trillion, twenty-one billion, two hundred million, twenty thousand, one hundred eleven".