121031021033 has 4 divisors (see below), whose sum is σ = 130341099588. Its totient is φ = 111720942480.

The previous prime is 121031020967. The next prime is 121031021077. The reversal of 121031021033 is 330120130121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 330120130121 = 103 ⋅3205049807.

It can be written as a sum of positive squares in 2 ways, for example, as 59451605929 + 61579415104 = 243827^2 + 248152^2 .

It is a cyclic number.

It is not a de Polignac number, because 121031021033 - 2¹⁰ = 121031020009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121031021833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4655039258 + ... + 4655039283.

It is an arithmetic number, because the mean of its divisors is an integer number (32585274897).

Almost surely, 2^121031021033 is an apocalyptic number.

121031021033 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

121031021033 is a deficient number, since it is larger than the sum of its proper divisors (9310078555).

121031021033 is an equidigital number, since it uses as much as digits as its factorization.

121031021033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9310078554.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 121031021033 its reverse (330120130121), we get a palindrome (451151151154).

The spelling of 121031021033 in words is "one hundred twenty-one billion, thirty-one million, twenty-one thousand, thirty-three".