121001221101 has 16 divisors (see below), whose sum is σ = 166293586304. Its totient is φ = 78203911104.

The previous prime is 121001221087. The next prime is 121001221139. The reversal of 121001221101 is 101122100121.

It is not a de Polignac number, because 121001221101 - 2⁶ = 121001221037 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 (121001221301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1936945 + ... + 1998438.

It is an arithmetic number, because the mean of its divisors is an integer number (10393349144).

Almost surely, 2^121001221101 is an apocalyptic number.

It is an amenable number.

121001221101 is a deficient number, since it is larger than the sum of its proper divisors (45292365203).

121001221101 is a wasteful number, since it uses less digits than its factorization.

121001221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3935700.

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

Adding to 121001221101 its reverse (101122100121), we get a palindrome (222123321222).

The spelling of 121001221101 in words is "one hundred twenty-one billion, one million, two hundred twenty-one thousand, one hundred one".