20311121034111 has 32 divisors (see below), whose sum is σ = 27588593088000. Its totient is φ = 13289074162560.

The previous prime is 20311121034107. The next prime is 20311121034233. The reversal of 20311121034111 is 11143012111302.

It is a happy number.

It is not a de Polignac number, because 20311121034111 - 2² = 20311121034107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311121034011) 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, 43403085 + ... + 43868553.

It is an arithmetic number, because the mean of its divisors is an integer number (862143534000).

Almost surely, 2^{20311121034111} is an apocalyptic number.

20311121034111 is a deficient number, since it is larger than the sum of its proper divisors (7277472053889).

20311121034111 is a wasteful number, since it uses less digits than its factorization.

20311121034111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466479.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 20311121034111 its reverse (11143012111302), we get a palindrome (31454133145413).

The spelling of 20311121034111 in words is "twenty trillion, three hundred eleven billion, one hundred twenty-one million, thirty-four thousand, one hundred eleven".