121221133001 has 4 divisors (see below), whose sum is σ = 125401172100. Its totient is φ = 117041093904.

The previous prime is 121221132953. The next prime is 121221133003. The reversal of 121221133001 is 100331122121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80612837776 + 40608295225 = 283924^2 + 201515^2 .

It is a cyclic number.

It is not a de Polignac number, because 121221133001 - 2²² = 121216938697 is a prime.

It is a super-2 number, since 2×121221133001² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121221133003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2090019506 + ... + 2090019563.

It is an arithmetic number, because the mean of its divisors is an integer number (31350293025).

Almost surely, 2^121221133001 is an apocalyptic number.

It is an amenable number.

121221133001 is a deficient number, since it is larger than the sum of its proper divisors (4180039099).

121221133001 is an equidigital number, since it uses as much as digits as its factorization.

121221133001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4180039098.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 121221133001 its reverse (100331122121), we get a palindrome (221552255122).

The spelling of 121221133001 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred thirty-three thousand, one".