1221102010011 has 32 divisors (see below), whose sum is σ = 1772162280000. Its totient is φ = 743408640000.

The previous prime is 1221102009971. The next prime is 1221102010067. The reversal of 1221102010011 is 1100102011221.

It is not a de Polignac number, because 1221102010011 - 2¹⁴ = 1221101993627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221102010111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4795711 + ... + 5043911.

It is an arithmetic number, because the mean of its divisors is an integer number (55380071250).

Almost surely, 2^{1221102010011} is an apocalyptic number.

1221102010011 is a deficient number, since it is larger than the sum of its proper divisors (551060269989).

1221102010011 is a wasteful number, since it uses less digits than its factorization.

1221102010011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249567.

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

Adding to 1221102010011 its reverse (1100102011221), we get a palindrome (2321204021232).

The spelling of 1221102010011 in words is "one trillion, two hundred twenty-one billion, one hundred two million, ten thousand, eleven".