33121197 has 8 divisors (see below), whose sum is σ = 49068480. Its totient is φ = 22080780.

The previous prime is 33121181. The next prime is 33121213. The reversal of 33121197 is 79112133.

It is an interprime number because it is at equal distance from previous prime (33121181) and next prime (33121213).

It is not a de Polignac number, because 33121197 - 2⁴ = 33121181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1226711 = 33121197 / (3 + 3 + 1 + 2 + 1 + 1 + 9 + 7).

It is a self number, because there is not a number n which added to its sum of digits gives 33121197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33121097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613329 + ... + 613382.

It is an arithmetic number, because the mean of its divisors is an integer number (6133560).

Almost surely, 2^33121197 is an apocalyptic number.

It is an amenable number.

33121197 is a deficient number, since it is larger than the sum of its proper divisors (15947283).

33121197 is a wasteful number, since it uses less digits than its factorization.

33121197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226720 (or 1226714 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 33121197 is about 5755.1018235996. The cubic root of 33121197 is about 321.1456235069.

It can be divided in two parts, 331 and 21197, that added together give a triangular number (21528 = T₂₀₇).

The spelling of 33121197 in words is "thirty-three million, one hundred twenty-one thousand, one hundred ninety-seven".