35120021 has 4 divisors (see below), whose sum is σ = 35135532. Its totient is φ = 35104512.

The previous prime is 35120009. The next prime is 35120053. The reversal of 35120021 is 12002153.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12002153 = 17 ⋅706009.

It can be written as a sum of positive squares in 2 ways, for example, as 27447121 + 7672900 = 5239^2 + 2770^2 .

It is a cyclic number.

It is not a de Polignac number, because 35120021 - 2¹⁰ = 35118997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 35119978 and 35120005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (35120321) 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, 3626 + ... + 9131.

It is an arithmetic number, because the mean of its divisors is an integer number (8783883).

Almost surely, 2^35120021 is an apocalyptic number.

It is an amenable number.

35120021 is a deficient number, since it is larger than the sum of its proper divisors (15511).

35120021 is a wasteful number, since it uses less digits than its factorization.

35120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15510.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 35120021 is about 5926.2147278005. The cubic root of 35120021 is about 327.4801060114.

Adding to 35120021 its reverse (12002153), we get a palindrome (47122174).

The spelling of 35120021 in words is "thirty-five million, one hundred twenty thousand, twenty-one".