121421001033 has 24 divisors (see below), whose sum is σ = 176169963528. Its totient is φ = 80586127872.

The previous prime is 121421001007. The next prime is 121421001047. The reversal of 121421001033 is 330100124121.

It can be written as a sum of positive squares in 4 ways, for example, as 13135910544 + 108285090489 = 114612^2 + 329067^2 .

It is not a de Polignac number, because 121421001033 - 2¹⁷ = 121420869961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121421000997 and 121421001015.

It is not an unprimeable number, because it can be changed into a prime (121421002033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2177841 + ... + 2232897.

It is an arithmetic number, because the mean of its divisors is an integer number (7340415147).

Almost surely, 2^121421001033 is an apocalyptic number.

It is an amenable number.

121421001033 is a deficient number, since it is larger than the sum of its proper divisors (54748962495).

121421001033 is a wasteful number, since it uses less digits than its factorization.

121421001033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56153 (or 56150 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 121421001033 its reverse (330100124121), we get a palindrome (451521125154).

The spelling of 121421001033 in words is "one hundred twenty-one billion, four hundred twenty-one million, one thousand, thirty-three".