1211316304621 has 2 divisors, whose sum is σ = 1211316304622. Its totient is φ = 1211316304620.

The previous prime is 1211316304603. The next prime is 1211316304631. The reversal of 1211316304621 is 1264036131121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1149108961225 + 62207343396 = 1071965^2 + 249414^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211316304621 - 2¹³ = 1211316296429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211316304631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605658152310 + 605658152311.

It is an arithmetic number, because the mean of its divisors is an integer number (605658152311).

Almost surely, 2^{1211316304621} is an apocalyptic number.

It is an amenable number.

1211316304621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211316304621 is an equidigital number, since it uses as much as digits as its factorization.

1211316304621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 1211316304621 in words is "one trillion, two hundred eleven billion, three hundred sixteen million, three hundred four thousand, six hundred twenty-one".