121121021001 has 32 divisors (see below), whose sum is σ = 171311808640. Its totient is φ = 75906699264.

The previous prime is 121121020973. The next prime is 121121021051. The reversal of 121121021001 is 100120121121.

It is not a de Polignac number, because 121121021001 - 2⁷ = 121121020873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121121021051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4353531 + ... + 4381263.

It is an arithmetic number, because the mean of its divisors is an integer number (5353494020).

Almost surely, 2^121121021001 is an apocalyptic number.

It is an amenable number.

121121021001 is a deficient number, since it is larger than the sum of its proper divisors (50190787639).

121121021001 is a wasteful number, since it uses less digits than its factorization.

121121021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28345.

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

Adding to 121121021001 its reverse (100120121121), we get a palindrome (221241142122).

The spelling of 121121021001 in words is "one hundred twenty-one billion, one hundred twenty-one million, twenty-one thousand, one".