220131203033221 has 2 divisors, whose sum is σ = 220131203033222. Its totient is φ = 220131203033220.

The previous prime is 220131203033213. The next prime is 220131203033249. The reversal of 220131203033221 is 122330302131022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199696183332100 + 20435019701121 = 14131390^2 + 4520511^2 .

It is a cyclic number.

It is not a de Polignac number, because 220131203033221 - 2³ = 220131203033213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220131203033201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110065601516610 + 110065601516611.

It is an arithmetic number, because the mean of its divisors is an integer number (110065601516611).

Almost surely, 2^{220131203033221} is an apocalyptic number.

It is an amenable number.

220131203033221 is a deficient number, since it is larger than the sum of its proper divisors (1).

220131203033221 is an equidigital number, since it uses as much as digits as its factorization.

220131203033221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 220131203033221 its reverse (122330302131022), we get a palindrome (342461505164243).

The spelling of 220131203033221 in words is "two hundred twenty trillion, one hundred thirty-one billion, two hundred three million, thirty-three thousand, two hundred twenty-one".