121021101001 has 4 divisors (see below), whose sum is σ = 121085578692. Its totient is φ = 120956623312.

The previous prime is 121021100969. The next prime is 121021101007. The reversal of 121021101001 is 100101120121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100101120121 = 31 ⋅3229068391.

It can be written as a sum of positive squares in 2 ways, for example, as 104119800976 + 16901300025 = 322676^2 + 130005^2 .

It is a cyclic number.

It is not a de Polignac number, because 121021101001 - 2⁵ = 121021100969 is a prime.

It is a super-2 number, since 2×121021101001² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121021101007) 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, 32236030 + ... + 32239783.

It is an arithmetic number, because the mean of its divisors is an integer number (30271394673).

Almost surely, 2^121021101001 is an apocalyptic number.

It is an amenable number.

121021101001 is a deficient number, since it is larger than the sum of its proper divisors (64477691).

121021101001 is an equidigital number, since it uses as much as digits as its factorization.

121021101001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64477690.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 121021101001 its reverse (100101120121), we get a palindrome (221122221122).

The spelling of 121021101001 in words is "one hundred twenty-one billion, twenty-one million, one hundred one thousand, one".