121021001121 has 8 divisors (see below), whose sum is σ = 161439333120. Its totient is φ = 80641668272.

The previous prime is 121021001119. The next prime is 121021001149. The reversal of 121021001121 is 121100120121.

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

It is a cyclic number.

It is not a de Polignac number, because 121021001121 - 2¹ = 121021001119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121021001097 and 121021001106.

It is not an unprimeable number, because it can be changed into a prime (121021001161) 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, 9742545 + ... + 9754958.

It is an arithmetic number, because the mean of its divisors is an integer number (20179916640).

Almost surely, 2^121021001121 is an apocalyptic number.

It is an amenable number.

121021001121 is a deficient number, since it is larger than the sum of its proper divisors (40418331999).

121021001121 is a wasteful number, since it uses less digits than its factorization.

121021001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19499575.

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

Adding to 121021001121 its reverse (121100120121), we get a palindrome (242121121242).

The spelling of 121021001121 in words is "one hundred twenty-one billion, twenty-one million, one thousand, one hundred twenty-one".