1211012346653 has 2 divisors, whose sum is σ = 1211012346654. Its totient is φ = 1211012346652.

The previous prime is 1211012346563. The next prime is 1211012346707. The reversal of 1211012346653 is 3566432101121.

Together with previous prime (1211012346563) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1125165104644 + 85847242009 = 1060738^2 + 292997^2 .

It is an emirp because it is prime and its reverse (3566432101121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1211012346653 - 2⁴⁰ = 111500718877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211012346053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605506173326 + 605506173327.

It is an arithmetic number, because the mean of its divisors is an integer number (605506173327).

Almost surely, 2^{1211012346653} is an apocalyptic number.

It is an amenable number.

1211012346653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211012346653 is an equidigital number, since it uses as much as digits as its factorization.

1211012346653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

Adding to 1211012346653 its reverse (3566432101121), we get a palindrome (4777444447774).

The spelling of 1211012346653 in words is "one trillion, two hundred eleven billion, twelve million, three hundred forty-six thousand, six hundred fifty-three".