1011221012311 has 2 divisors, whose sum is σ = 1011221012312. Its totient is φ = 1011221012310.

The previous prime is 1011221012267. The next prime is 1011221012357. The reversal of 1011221012311 is 1132101221101.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1011221012311 - 2⁹ = 1011221011799 is a prime.

It is a super-2 number, since 2×1011221012311² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011221012411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505610506155 + 505610506156.

It is an arithmetic number, because the mean of its divisors is an integer number (505610506156).

Almost surely, 2^{1011221012311} is an apocalyptic number.

1011221012311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011221012311 is an equidigital number, since it uses as much as digits as its factorization.

1011221012311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1011221012311 its reverse (1132101221101), we get a palindrome (2143322233412).

The spelling of 1011221012311 in words is "one trillion, eleven billion, two hundred twenty-one million, twelve thousand, three hundred eleven".