121120002021 has 16 divisors (see below), whose sum is σ = 164710744704. Its totient is φ = 79141118784.

The previous prime is 121120001971. The next prime is 121120002037. The reversal of 121120002021 is 120200021121.

It is not a de Polignac number, because 121120002021 - 2³⁰ = 120046260197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121120001988 and 121120002006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121120002061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240126 + ... + 547631.

It is an arithmetic number, because the mean of its divisors is an integer number (10294421544).

Almost surely, 2^121120002021 is an apocalyptic number.

It is an amenable number.

121120002021 is a deficient number, since it is larger than the sum of its proper divisors (43590742683).

121120002021 is an equidigital number, since it uses as much as digits as its factorization.

121120002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788780.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121120002021 its reverse (120200021121), we get a palindrome (241320023142).

The spelling of 121120002021 in words is "one hundred twenty-one billion, one hundred twenty million, two thousand, twenty-one".