201111331421 has 32 divisors (see below), whose sum is σ = 274053900288. Its totient is φ = 142496418240.

The previous prime is 201111331403. The next prime is 201111331427. The reversal of 201111331421 is 124133111102.

It is not a de Polignac number, because 201111331421 - 2⁶ = 201111331357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201111331393 and 201111331402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111331427) 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, 1432265 + ... + 1566398.

It is an arithmetic number, because the mean of its divisors is an integer number (8564184384).

Almost surely, 2^201111331421 is an apocalyptic number.

It is an amenable number.

201111331421 is a deficient number, since it is larger than the sum of its proper divisors (72942568867).

201111331421 is a wasteful number, since it uses less digits than its factorization.

201111331421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2998761.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 201111331421 its reverse (124133111102), we get a palindrome (325244442523).

The spelling of 201111331421 in words is "two hundred one billion, one hundred eleven million, three hundred thirty-one thousand, four hundred twenty-one".