1221110001102 has 8 divisors (see below), whose sum is σ = 2442220002216. Its totient is φ = 407036667032.

The previous prime is 1221110001019. The next prime is 1221110001103. The reversal of 1221110001102 is 2011000111221.

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

1221110001102 is an admirable number.

It is a super-2 number, since 2×1221110001102² (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 (1221110001103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101759166753 + ... + 101759166764.

It is an arithmetic number, because the mean of its divisors is an integer number (305277500277).

Almost surely, 2^{1221110001102} is an apocalyptic number.

1221110001102 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221110001102 is a wasteful number, since it uses less digits than its factorization.

1221110001102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203518333522.

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

Adding to 1221110001102 its reverse (2011000111221), we get a palindrome (3232110112323).

The spelling of 1221110001102 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, one thousand, one hundred two".