2555211120221 has 4 divisors (see below), whose sum is σ = 2555254849344. Its totient is φ = 2555167391100.

The previous prime is 2555211120193. The next prime is 2555211120233. The reversal of 2555211120221 is 1220211125552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2555211120221 - 2²² = 2555206925917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2555211120281) 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, 21776795 + ... + 21893816.

It is an arithmetic number, because the mean of its divisors is an integer number (638813712336).

Almost surely, 2^{2555211120221} is an apocalyptic number.

It is an amenable number.

2555211120221 is a deficient number, since it is larger than the sum of its proper divisors (43729123).

2555211120221 is an equidigital number, since it uses as much as digits as its factorization.

2555211120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43729122.

The product of its (nonzero) digits is 4000, while the sum is 29.

Adding to 2555211120221 its reverse (1220211125552), we get a palindrome (3775422245773).

The spelling of 2555211120221 in words is "two trillion, five hundred fifty-five billion, two hundred eleven million, one hundred twenty thousand, two hundred twenty-one".