121100221001 has 8 divisors (see below), whose sum is σ = 123050748744. Its totient is φ = 119157575040.

The previous prime is 121100220991. The next prime is 121100221027. The reversal of 121100221001 is 100122001121.

It can be written as a sum of positive squares in 4 ways, for example, as 9510150400 + 111590070601 = 97520^2 + 334051^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121100221001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121100221091) 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, 1939466 + ... + 2000931.

It is an arithmetic number, because the mean of its divisors is an integer number (15381343593).

Almost surely, 2^121100221001 is an apocalyptic number.

It is an amenable number.

121100221001 is a deficient number, since it is larger than the sum of its proper divisors (1950527743).

121100221001 is an equidigital number, since it uses as much as digits as its factorization.

121100221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3940891.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121100221001 its reverse (100122001121), we get a palindrome (221222222122).

The spelling of 121100221001 in words is "one hundred twenty-one billion, one hundred million, two hundred twenty-one thousand, one".