211111201131121 has 8 divisors (see below), whose sum is σ = 212333000586344. Its totient is φ = 209892259687680.

The previous prime is 211111201131109. The next prime is 211111201131137. The reversal of 211111201131121 is 121131102111112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9864065585521 + 201247135545600 = 3140711^2 + 14186160^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 211111201131121 - 2¹³ = 211111201122929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211111201131161) 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, 714354786 + ... + 714650251.

It is an arithmetic number, because the mean of its divisors is an integer number (26541625073293).

Almost surely, 2^{211111201131121} is an apocalyptic number.

It is an amenable number.

211111201131121 is a deficient number, since it is larger than the sum of its proper divisors (1221799455223).

211111201131121 is a wasteful number, since it uses less digits than its factorization.

211111201131121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429005891.

The product of its (nonzero) digits is 24, while the sum is 19.

Adding to 211111201131121 its reverse (121131102111112), we get a palindrome (332242303242233).

The spelling of 211111201131121 in words is "two hundred eleven trillion, one hundred eleven billion, two hundred one million, one hundred thirty-one thousand, one hundred twenty-one".