9021218137 has 4 divisors (see below), whose sum is σ = 9021738960. Its totient is φ = 9020697316.

The previous prime is 9021218131. The next prime is 9021218189. The reversal of 9021218137 is 7318121209.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9021218137 - 2³¹ = 6873734489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9021218131) 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, 233503 + ... + 269380.

It is an arithmetic number, because the mean of its divisors is an integer number (2255434740).

Almost surely, 2^9021218137 is an apocalyptic number.

It is an amenable number.

9021218137 is a deficient number, since it is larger than the sum of its proper divisors (520823).

9021218137 is a wasteful number, since it uses less digits than its factorization.

9021218137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520822.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 9021218137 is about 94980.0933722430. The cubic root of 9021218137 is about 2081.7171884110.

The spelling of 9021218137 in words is "nine billion, twenty-one million, two hundred eighteen thousand, one hundred thirty-seven".