1221250631033 has 2 divisors, whose sum is σ = 1221250631034. Its totient is φ = 1221250631032.

The previous prime is 1221250630997. The next prime is 1221250631077. The reversal of 1221250631033 is 3301360521221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1221120031849 + 130599184 = 1105043^2 + 11428^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221250631033 - 2¹⁶ = 1221250565497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221250630987 and 1221250631005.

It is not a weakly prime, because it can be changed into another prime (1221250631093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610625315516 + 610625315517.

It is an arithmetic number, because the mean of its divisors is an integer number (610625315517).

Almost surely, 2^{1221250631033} is an apocalyptic number.

It is an amenable number.

1221250631033 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221250631033 is an equidigital number, since it uses as much as digits as its factorization.

1221250631033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The spelling of 1221250631033 in words is "one trillion, two hundred twenty-one billion, two hundred fifty million, six hundred thirty-one thousand, thirty-three".