121002201111021 has 4 divisors (see below), whose sum is σ = 161336268148032. Its totient is φ = 80668134074012.

The previous prime is 121002201110981. The next prime is 121002201111041. The reversal of 121002201111021 is 120111102200121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121002201111021 - 2²² = 121002196916717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002201111041) 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, 20167033518501 + ... + 20167033518506.

It is an arithmetic number, because the mean of its divisors is an integer number (40334067037008).

Almost surely, 2^{121002201111021} is an apocalyptic number.

It is an amenable number.

121002201111021 is a deficient number, since it is larger than the sum of its proper divisors (40334067037011).

121002201111021 is an equidigital number, since it uses as much as digits as its factorization.

121002201111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40334067037010.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121002201111021 its reverse (120111102200121), we get a palindrome (241113303311142).

The spelling of 121002201111021 in words is "one hundred twenty-one trillion, two billion, two hundred one million, one hundred eleven thousand, twenty-one".