1020102311111 has 4 divisors (see below), whose sum is σ = 1098571719672. Its totient is φ = 941632902552.

The previous prime is 1020102311029. The next prime is 1020102311119. The reversal of 1020102311111 is 1111132010201.

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-1020102311111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020102311119) 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, 39234704261 + ... + 39234704286.

It is an arithmetic number, because the mean of its divisors is an integer number (274642929918).

Almost surely, 2^{1020102311111} is an apocalyptic number.

1020102311111 is a deficient number, since it is larger than the sum of its proper divisors (78469408561).

1020102311111 is an equidigital number, since it uses as much as digits as its factorization.

1020102311111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78469408560.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 1020102311111 its reverse (1111132010201), we get a palindrome (2131234321312).

The spelling of 1020102311111 in words is "one trillion, twenty billion, one hundred two million, three hundred eleven thousand, one hundred eleven".