33420100121 has 4 divisors (see below), whose sum is σ = 33420696612. Its totient is φ = 33419503632.

The previous prime is 33420100117. The next prime is 33420100123. The reversal of 33420100121 is 12100102433.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12100102433 = 43 ⋅281397731.

It can be written as a sum of positive squares in 2 ways, for example, as 11038444096 + 22381656025 = 105064^2 + 149605^2 .

It is a cyclic number.

It is not a de Polignac number, because 33420100121 - 2² = 33420100117 is a prime.

It is a super-2 number, since 2×33420100121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33420100121.

It is not an unprimeable number, because it can be changed into a prime (33420100123) 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, 204350 + ... + 329543.

It is an arithmetic number, because the mean of its divisors is an integer number (8355174153).

Almost surely, 2^33420100121 is an apocalyptic number.

It is an amenable number.

33420100121 is a deficient number, since it is larger than the sum of its proper divisors (596491).

33420100121 is an equidigital number, since it uses as much as digits as its factorization.

33420100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596490.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 33420100121 its reverse (12100102433), we get a palindrome (45520202554).

The spelling of 33420100121 in words is "thirty-three billion, four hundred twenty million, one hundred thousand, one hundred twenty-one".