121220211101 has 32 divisors (see below), whose sum is σ = 142426263168. Its totient is φ = 101944535040.

The previous prime is 121220211043. The next prime is 121220211181. The reversal of 121220211101 is 101112022121.

It is not a de Polignac number, because 121220211101 - 2¹⁰ = 121220210077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220211181) 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, 3984590 + ... + 4014896.

It is an arithmetic number, because the mean of its divisors is an integer number (4450820724).

Almost surely, 2^121220211101 is an apocalyptic number.

121220211101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121220211101 is a deficient number, since it is larger than the sum of its proper divisors (21206052067).

121220211101 is a wasteful number, since it uses less digits than its factorization.

121220211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30701.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121220211101 its reverse (101112022121), we get a palindrome (222332233222).

The spelling of 121220211101 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred eleven thousand, one hundred one".