1221110002311 has 16 divisors (see below), whose sum is σ = 1685110308960. Its totient is φ = 785618870400.

The previous prime is 1221110002303. The next prime is 1221110002319. The reversal of 1221110002311 is 1132000111221.

It is an interprime number because it is at equal distance from previous prime (1221110002303) and next prime (1221110002319).

It is not a de Polignac number, because 1221110002311 - 2³ = 1221110002303 is a prime.

It is a super-2 number, since 2×1221110002311² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221110002319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3239740 + ... + 3596961.

It is an arithmetic number, because the mean of its divisors is an integer number (105319394310).

Almost surely, 2^{1221110002311} is an apocalyptic number.

1221110002311 is a deficient number, since it is larger than the sum of its proper divisors (464000306649).

1221110002311 is a wasteful number, since it uses less digits than its factorization.

1221110002311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6838786.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1221110002311 its reverse (1132000111221), we get a palindrome (2353110113532).

The spelling of 1221110002311 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, two thousand, three hundred eleven".