10101920111 has 4 divisors (see below), whose sum is σ = 10201939224. Its totient is φ = 10001901000.

The previous prime is 10101920093. The next prime is 10101920141. The reversal of 10101920111 is 11102910101.

It is a happy number.

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-10101920111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10101920111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101920141) 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, 50009405 + ... + 50009606.

It is an arithmetic number, because the mean of its divisors is an integer number (2550484806).

Almost surely, 2^10101920111 is an apocalyptic number.

10101920111 is a deficient number, since it is larger than the sum of its proper divisors (100019113).

10101920111 is a wasteful number, since it uses less digits than its factorization.

10101920111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100019112.

The product of its (nonzero) digits is 18, while the sum is 17.

The spelling of 10101920111 in words is "ten billion, one hundred one million, nine hundred twenty thousand, one hundred eleven".