1000121111021 has 8 divisors (see below), whose sum is σ = 1016631770880. Its totient is φ = 983706723792.

The previous prime is 1000121110999. The next prime is 1000121111023. The reversal of 1000121111021 is 1201111210001.

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 1000121111021 - 2⁶ = 1000121110957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000121110993 and 1000121111011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000121111023) 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, 24047210 + ... + 24088763.

It is an arithmetic number, because the mean of its divisors is an integer number (127078971360).

Almost surely, 2^{1000121111021} is an apocalyptic number.

It is an amenable number.

1000121111021 is a deficient number, since it is larger than the sum of its proper divisors (16510659859).

1000121111021 is an equidigital number, since it uses as much as digits as its factorization.

1000121111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48136315.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1000121111021 its reverse (1201111210001), we get a palindrome (2201232321022).

The spelling of 1000121111021 in words is "one trillion, one hundred twenty-one million, one hundred eleven thousand, twenty-one".