121201021001 has 8 divisors (see below), whose sum is σ = 123497732160. Its totient is φ = 118904676592.

The previous prime is 121201020977. The next prime is 121201021069. The reversal of 121201021001 is 100120102121.

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

It is not a de Polignac number, because 121201021001 - 2⁶ = 121201020937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121201020001) 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, 628610 + ... + 798468.

It is an arithmetic number, because the mean of its divisors is an integer number (15437216520).

Almost surely, 2^121201021001 is an apocalyptic number.

It is an amenable number.

121201021001 is a deficient number, since it is larger than the sum of its proper divisors (2296711159).

121201021001 is a wasteful number, since it uses less digits than its factorization.

121201021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183375.

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

Adding to 121201021001 its reverse (100120102121), we get a palindrome (221321123122).

The spelling of 121201021001 in words is "one hundred twenty-one billion, two hundred one million, twenty-one thousand, one".