1020120200111 has 4 divisors (see below), whose sum is σ = 1022783699712. Its totient is φ = 1017456700512.

The previous prime is 1020120200089. The next prime is 1020120200119. The reversal of 1020120200111 is 1110020210201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020120200111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020120200092 and 1020120200101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020120200119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1331749226 + ... + 1331749991.

It is an arithmetic number, because the mean of its divisors is an integer number (255695924928).

Almost surely, 2^{1020120200111} is an apocalyptic number.

1020120200111 is a deficient number, since it is larger than the sum of its proper divisors (2663499601).

1020120200111 is an equidigital number, since it uses as much as digits as its factorization.

1020120200111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2663499600.

The product of its (nonzero) digits is 8, while the sum is 11.

Subtracting from 1020120200111 its sum of digits (11), we obtain a square (1020120200100 = 1010010²).

Adding to 1020120200111 its reverse (1110020210201), we get a palindrome (2130140410312).

The spelling of 1020120200111 in words is "one trillion, twenty billion, one hundred twenty million, two hundred thousand, one hundred eleven".