1020101111 has 4 divisors (see below), whose sum is σ = 1030201224. Its totient is φ = 1010001000.

The previous prime is 1020101087. The next prime is 1020101119. The reversal of 1020101111 is 1111010201.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1020101111 - 2²² = 1015906807 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 (1020101119) 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, 5049905 + ... + 5050106.

It is an arithmetic number, because the mean of its divisors is an integer number (257550306).

Almost surely, 2^1020101111 is an apocalyptic number.

1020101111 is a deficient number, since it is larger than the sum of its proper divisors (10100113).

1020101111 is a wasteful number, since it uses less digits than its factorization.

1020101111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10100112.

The product of its (nonzero) digits is 2, while the sum is 8.

The square root of 1020101111 is about 31939.0217602230. The cubic root of 1020101111 is about 1006.6559701045.

Adding to 1020101111 its reverse (1111010201), we get a palindrome (2131111312).

The spelling of 1020101111 in words is "one billion, twenty million, one hundred one thousand, one hundred eleven".