1221112040311 has 2 divisors, whose sum is σ = 1221112040312. Its totient is φ = 1221112040310.

The previous prime is 1221112040303. The next prime is 1221112040333. The reversal of 1221112040311 is 1130402111221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221112040311 - 2³ = 1221112040303 is a prime.

It is a super-2 number, since 2×1221112040311² (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 (1221112040011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610556020155 + 610556020156.

It is an arithmetic number, because the mean of its divisors is an integer number (610556020156).

Almost surely, 2^{1221112040311} is an apocalyptic number.

1221112040311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221112040311 is an equidigital number, since it uses as much as digits as its factorization.

1221112040311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1221112040311 its reverse (1130402111221), we get a palindrome (2351514151532).

The spelling of 1221112040311 in words is "one trillion, two hundred twenty-one billion, one hundred twelve million, forty thousand, three hundred eleven".