211201134421 has 8 divisors (see below), whose sum is σ = 217280942424. Its totient is φ = 205165543680.

The previous prime is 211201134409. The next prime is 211201134449. The reversal of 211201134421 is 124431102112.

It can be written as a sum of positive squares in 4 ways, for example, as 782600625 + 210418533796 = 27975^2 + 458714^2 .

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 211201134421 - 2⁷ = 211201134293 is a prime.

It is a super-2 number, since 2×211201134421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211201134392 and 211201134401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211201134461) 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, 11044626 + ... + 11063731.

It is an arithmetic number, because the mean of its divisors is an integer number (27160117803).

Almost surely, 2^211201134421 is an apocalyptic number.

It is an amenable number.

211201134421 is a deficient number, since it is larger than the sum of its proper divisors (6079808003).

211201134421 is a wasteful number, since it uses less digits than its factorization.

211201134421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22108631.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 211201134421 its reverse (124431102112), we get a palindrome (335632236533).

The spelling of 211201134421 in words is "two hundred eleven billion, two hundred one million, one hundred thirty-four thousand, four hundred twenty-one".