1223055020251 has 2 divisors, whose sum is σ = 1223055020252. Its totient is φ = 1223055020250.

The previous prime is 1223055020249. The next prime is 1223055020261. The reversal of 1223055020251 is 1520205503221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1223055020251 - 2¹ = 1223055020249 is a prime.

It is a super-2 number, since 2×1223055020251² (a number of 25 digits) contains 22 as substring.

Together with 1223055020249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1223055020261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611527510125 + 611527510126.

It is an arithmetic number, because the mean of its divisors is an integer number (611527510126).

Almost surely, 2^{1223055020251} is an apocalyptic number.

1223055020251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223055020251 is an equidigital number, since it uses as much as digits as its factorization.

1223055020251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 1223055020251 in words is "one trillion, two hundred twenty-three billion, fifty-five million, twenty thousand, two hundred fifty-one".