1221110002011 has 8 divisors (see below), whose sum is σ = 1628232559120. Its totient is φ = 814030389792.

The previous prime is 1221110001931. The next prime is 1221110002019. The reversal of 1221110002011 is 1102000111221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1221110002011 - 2²² = 1221105807707 is a prime.

It is a super-2 number, since 2×1221110002011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221110002019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10669816 + ... + 10783653.

It is an arithmetic number, because the mean of its divisors is an integer number (203529069890).

Almost surely, 2^{1221110002011} is an apocalyptic number.

1221110002011 is a deficient number, since it is larger than the sum of its proper divisors (407122557109).

1221110002011 is a wasteful number, since it uses less digits than its factorization.

1221110002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21472445.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1221110002011 its reverse (1102000111221), we get a palindrome (2323110113232).

The spelling of 1221110002011 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, two thousand, eleven".