212011230401 has 4 divisors (see below), whose sum is σ = 215486824404. Its totient is φ = 208535636400.

The previous prime is 212011230397. The next prime is 212011230413. The reversal of 212011230401 is 104032110212.

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 26981347600 + 185029882801 = 164260^2 + 430151^2 .

It is a cyclic number.

It is not a de Polignac number, because 212011230401 - 2² = 212011230397 is a prime.

It is a super-2 number, since 2×212011230401² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212011230401.

It is not an unprimeable number, because it can be changed into a prime (212011230601) 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, 1737796910 + ... + 1737797031.

It is an arithmetic number, because the mean of its divisors is an integer number (53871706101).

Almost surely, 2^212011230401 is an apocalyptic number.

It is an amenable number.

212011230401 is a deficient number, since it is larger than the sum of its proper divisors (3475594003).

212011230401 is an equidigital number, since it uses as much as digits as its factorization.

212011230401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3475594002.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 212011230401 its reverse (104032110212), we get a palindrome (316043340613).

The spelling of 212011230401 in words is "two hundred twelve billion, eleven million, two hundred thirty thousand, four hundred one".