1211022031313 has 2 divisors, whose sum is σ = 1211022031314. Its totient is φ = 1211022031312.

The previous prime is 1211022031249. The next prime is 1211022031337. The reversal of 1211022031313 is 3131302201121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1150078221889 + 60943809424 = 1072417^2 + 246868^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211022031313 - 2⁶ = 1211022031249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211022031013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605511015656 + 605511015657.

It is an arithmetic number, because the mean of its divisors is an integer number (605511015657).

Almost surely, 2^{1211022031313} is an apocalyptic number.

It is an amenable number.

1211022031313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211022031313 is an equidigital number, since it uses as much as digits as its factorization.

1211022031313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1211022031313 its reverse (3131302201121), we get a palindrome (4342324232434).

The spelling of 1211022031313 in words is "one trillion, two hundred eleven billion, twenty-two million, thirty-one thousand, three hundred thirteen".