1211215011353 has 2 divisors, whose sum is σ = 1211215011354. Its totient is φ = 1211215011352.

The previous prime is 1211215011341. The next prime is 1211215011371. The reversal of 1211215011353 is 3531105121121.

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., 860120840329 + 351094171024 = 927427^2 + 592532^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211215011353 - 2³⁰ = 1210141269529 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211215011553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605607505676 + 605607505677.

It is an arithmetic number, because the mean of its divisors is an integer number (605607505677).

Almost surely, 2^{1211215011353} is an apocalyptic number.

It is an amenable number.

1211215011353 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211215011353 is an equidigital number, since it uses as much as digits as its factorization.

1211215011353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 26.

The spelling of 1211215011353 in words is "one trillion, two hundred eleven billion, two hundred fifteen million, eleven thousand, three hundred fifty-three".