121200221110 has 16 divisors (see below), whose sum is σ = 218819498832. Its totient is φ = 48333621600.

The previous prime is 121200221083. The next prime is 121200221111. The reversal of 121200221110 is 11122002121.

It is a super-2 number, since 2×121200221110² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200221111) 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, 18304881 + ... + 18311500.

It is an arithmetic number, because the mean of its divisors is an integer number (13676218677).

Almost surely, 2^121200221110 is an apocalyptic number.

121200221110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121200221110 is a deficient number, since it is larger than the sum of its proper divisors (97619277722).

121200221110 is a wasteful number, since it uses less digits than its factorization.

121200221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36616719.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121200221110 its reverse (11122002121), we get a palindrome (132322223231).

The spelling of 121200221110 in words is "one hundred twenty-one billion, two hundred million, two hundred twenty-one thousand, one hundred ten".