212143120220401 has 4 divisors (see below), whose sum is σ = 216145820601972. Its totient is φ = 208140419838832.

The previous prime is 212143120220363. The next prime is 212143120220431. The reversal of 212143120220401 is 104022021341212.

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 68647853160000 + 143495267060401 = 8285400^2 + 11978951^2 .

It is a cyclic number.

It is not a de Polignac number, because 212143120220401 - 2³¹ = 212140972736753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212143120220431) 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, 2001350190706 + ... + 2001350190811.

It is an arithmetic number, because the mean of its divisors is an integer number (54036455150493).

Almost surely, 2^{212143120220401} is an apocalyptic number.

It is an amenable number.

212143120220401 is a deficient number, since it is larger than the sum of its proper divisors (4002700381571).

212143120220401 is an equidigital number, since it uses as much as digits as its factorization.

212143120220401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4002700381570.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 212143120220401 its reverse (104022021341212), we get a palindrome (316165141561613).

The spelling of 212143120220401 in words is "two hundred twelve trillion, one hundred forty-three billion, one hundred twenty million, two hundred twenty thousand, four hundred one".