1021225356553 has 2 divisors, whose sum is σ = 1021225356554. Its totient is φ = 1021225356552.

The previous prime is 1021225356533. The next prime is 1021225356587. The reversal of 1021225356553 is 3556535221201.

1021225356553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 885044429824 + 136180926729 = 940768^2 + 369027^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021225356553 - 2¹³ = 1021225348361 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021225356533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510612678276 + 510612678277.

It is an arithmetic number, because the mean of its divisors is an integer number (510612678277).

Almost surely, 2^{1021225356553} is an apocalyptic number.

It is an amenable number.

1021225356553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021225356553 is an equidigital number, since it uses as much as digits as its factorization.

1021225356553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270000, while the sum is 40.

The spelling of 1021225356553 in words is "one trillion, twenty-one billion, two hundred twenty-five million, three hundred fifty-six thousand, five hundred fifty-three".