211431431401 has 4 divisors (see below), whose sum is σ = 211436414532. Its totient is φ = 211426448272.

The previous prime is 211431431389. The next prime is 211431431447. The reversal of 211431431401 is 104134134112.

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 101687643225 + 109743788176 = 318885^2 + 331276^2 .

It is a cyclic number.

It is not a de Polignac number, because 211431431401 - 2¹³ = 211431423209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211431435401) 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, 2427370 + ... + 2512963.

It is an arithmetic number, because the mean of its divisors is an integer number (52859103633).

Almost surely, 2^211431431401 is an apocalyptic number.

It is an amenable number.

211431431401 is a deficient number, since it is larger than the sum of its proper divisors (4983131).

211431431401 is an equidigital number, since it uses as much as digits as its factorization.

211431431401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4983130.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 211431431401 its reverse (104134134112), we get a palindrome (315565565513).

The spelling of 211431431401 in words is "two hundred eleven billion, four hundred thirty-one million, four hundred thirty-one thousand, four hundred one".