211402642360331 has 4 divisors (see below), whose sum is σ = 212699591086632. Its totient is φ = 210105693634032.

The previous prime is 211402642360307. The next prime is 211402642360397. The reversal of 211402642360331 is 133063246204112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211402642360331 is a prime.

It is a super-2 number, since 2×211402642360331² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211402642060331) 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, 648474362906 + ... + 648474363231.

It is an arithmetic number, because the mean of its divisors is an integer number (53174897771658).

Almost surely, 2^{211402642360331} is an apocalyptic number.

211402642360331 is a deficient number, since it is larger than the sum of its proper divisors (1296948726301).

211402642360331 is a wasteful number, since it uses less digits than its factorization.

211402642360331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296948726300.

The product of its (nonzero) digits is 124416, while the sum is 38.

Adding to 211402642360331 its reverse (133063246204112), we get a palindrome (344465888564443).

The spelling of 211402642360331 in words is "two hundred eleven trillion, four hundred two billion, six hundred forty-two million, three hundred sixty thousand, three hundred thirty-one".