1221110201110 has 32 divisors (see below), whose sum is σ = 2327400011232. Its totient is φ = 459690816000.

The previous prime is 1221110201099. The next prime is 1221110201147. The reversal of 1221110201110 is 111020111221.

It is a happy number.

It is a super-2 number, since 2×1221110201110² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3798204 + ... + 4107136.

It is an arithmetic number, because the mean of its divisors is an integer number (72731250351).

Almost surely, 2^{1221110201110} is an apocalyptic number.

1221110201110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221110201110 is a deficient number, since it is larger than the sum of its proper divisors (1106289810122).

1221110201110 is a wasteful number, since it uses less digits than its factorization.

1221110201110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332208.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1221110201110 its reverse (111020111221), we get a palindrome (1332130312331).

The spelling of 1221110201110 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, two hundred one thousand, one hundred ten".