206105056011 has 32 divisors (see below), whose sum is σ = 307089699840. Its totient is φ = 136618509600.

The previous prime is 206105056009. The next prime is 206105056021. The reversal of 206105056011 is 110650501602.

It is a happy number.

206105056011 is a `hidden beast` number, since 2 + 0 + 6 + 1 + 0 + 50 + 5 + 601 + 1 = 666.

It is not a de Polignac number, because 206105056011 - 2¹ = 206105056009 is a prime.

It is a super-2 number, since 2×206105056011² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (206105056021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3493246 + ... + 3551756.

It is an arithmetic number, because the mean of its divisors is an integer number (9596553120).

Almost surely, 2^206105056011 is an apocalyptic number.

206105056011 is a deficient number, since it is larger than the sum of its proper divisors (100984643829).

206105056011 is a wasteful number, since it uses less digits than its factorization.

206105056011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59264 (or 59258 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

Adding to 206105056011 its reverse (110650501602), we get a palindrome (316755557613).

The spelling of 206105056011 in words is "two hundred six billion, one hundred five million, fifty-six thousand, eleven".