2254213451221 has 2 divisors, whose sum is σ = 2254213451222. Its totient is φ = 2254213451220.

The previous prime is 2254213451179. The next prime is 2254213451249. The reversal of 2254213451221 is 1221543124522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2253991768900 + 221682321 = 1501330^2 + 14889^2 .

It is a cyclic number.

It is not a de Polignac number, because 2254213451221 - 2⁷ = 2254213451093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2254213451261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1127106725610 + 1127106725611.

It is an arithmetic number, because the mean of its divisors is an integer number (1127106725611).

Almost surely, 2^{2254213451221} is an apocalyptic number.

It is an amenable number.

2254213451221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2254213451221 is an equidigital number, since it uses as much as digits as its factorization.

2254213451221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38400, while the sum is 34.

Adding to 2254213451221 its reverse (1221543124522), we get a palindrome (3475756575743).

The spelling of 2254213451221 in words is "two trillion, two hundred fifty-four billion, two hundred thirteen million, four hundred fifty-one thousand, two hundred twenty-one".