121002121001 has 4 divisors (see below), whose sum is σ = 121005360000. Its totient is φ = 120998882004.

The previous prime is 121002120983. The next prime is 121002121007. The reversal of 121002121001 is 100121200121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 100121200121 = 3779 ⋅26494099.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121002121001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121002121007) 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, 1562801 + ... + 1638398.

It is an arithmetic number, because the mean of its divisors is an integer number (30251340000).

Almost surely, 2^121002121001 is an apocalyptic number.

It is an amenable number.

121002121001 is a deficient number, since it is larger than the sum of its proper divisors (3238999).

121002121001 is an equidigital number, since it uses as much as digits as its factorization.

121002121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3238998.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121002121001 its reverse (100121200121), we get a palindrome (221123321122).

The spelling of 121002121001 in words is "one hundred twenty-one billion, two million, one hundred twenty-one thousand, one".