20111201401 has 4 divisors (see below), whose sum is σ = 20117978100. Its totient is φ = 20104424704.

The previous prime is 20111201393. The next prime is 20111201417. The reversal of 20111201401 is 10410211102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3120339600 + 16990861801 = 55860^2 + 130349^2 .

It is a cyclic number.

It is not a de Polignac number, because 20111201401 - 2³ = 20111201393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111201101) 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, 3383896 + ... + 3389833.

It is an arithmetic number, because the mean of its divisors is an integer number (5029494525).

Almost surely, 2^20111201401 is an apocalyptic number.

It is an amenable number.

20111201401 is a deficient number, since it is larger than the sum of its proper divisors (6776699).

20111201401 is an equidigital number, since it uses as much as digits as its factorization.

20111201401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6776698.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20111201401 its reverse (10410211102), we get a palindrome (30521412503).

The spelling of 20111201401 in words is "twenty billion, one hundred eleven million, two hundred one thousand, four hundred one".