211020111105 has 8 divisors (see below), whose sum is σ = 337632177792. Its totient is φ = 112544059248.

The previous prime is 211020111101. The next prime is 211020111109. The reversal of 211020111105 is 501111020112.

It is an interprime number because it is at equal distance from previous prime (211020111101) and next prime (211020111109).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211020111105 - 2² = 211020111101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 14068007407 = 211020111105 / (2 + 1 + 1 + 0 + 2 + 0 + 1 + 1 + 1 + 1 + 0 + 5).

It is not an unprimeable number, because it can be changed into a prime (211020111101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7034003689 + ... + 7034003718.

It is an arithmetic number, because the mean of its divisors is an integer number (42204022224).

Almost surely, 2^211020111105 is an apocalyptic number.

It is an amenable number.

211020111105 is a deficient number, since it is larger than the sum of its proper divisors (126612066687).

211020111105 is a wasteful number, since it uses less digits than its factorization.

211020111105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14068007415.

The product of its (nonzero) digits is 20, while the sum is 15.

Adding to 211020111105 its reverse (501111020112), we get a palindrome (712131131217).

The spelling of 211020111105 in words is "two hundred eleven billion, twenty million, one hundred eleven thousand, one hundred five".