121111021001021 has 4 divisors (see below), whose sum is σ = 121294801003200. Its totient is φ = 120927240998844.

The previous prime is 121111021001011. The next prime is 121111021001071. The reversal of 121111021001021 is 120100120111121.

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 a de Polignac number, because none of the positive numbers 2^k-121111021001021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121111021000987 and 121111021001005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111021001011) 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, 91890000101 + ... + 91890001418.

It is an arithmetic number, because the mean of its divisors is an integer number (30323700250800).

Almost surely, 2^{121111021001021} is an apocalyptic number.

It is an amenable number.

121111021001021 is a deficient number, since it is larger than the sum of its proper divisors (183780002179).

121111021001021 is an equidigital number, since it uses as much as digits as its factorization.

121111021001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183780002178.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 121111021001021 its reverse (120100120111121), we get a palindrome (241211141112142).

The spelling of 121111021001021 in words is "one hundred twenty-one trillion, one hundred eleven billion, twenty-one million, one thousand, twenty-one".