254551102021 has 2 divisors, whose sum is σ = 254551102022. Its totient is φ = 254551102020.

The previous prime is 254551101979. The next prime is 254551102027. The reversal of 254551102021 is 120201155452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 232602679521 + 21948422500 = 482289^2 + 148150^2 .

It is a cyclic number.

It is not a de Polignac number, because 254551102021 - 2⁹ = 254551101509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254551102027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127275551010 + 127275551011.

It is an arithmetic number, because the mean of its divisors is an integer number (127275551011).

Almost surely, 2^254551102021 is an apocalyptic number.

It is an amenable number.

254551102021 is a deficient number, since it is larger than the sum of its proper divisors (1).

254551102021 is an equidigital number, since it uses as much as digits as its factorization.

254551102021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 254551102021 its reverse (120201155452), we get a palindrome (374752257473).

The spelling of 254551102021 in words is "two hundred fifty-four billion, five hundred fifty-one million, one hundred two thousand, twenty-one".