9021210121 has 48 divisors (see below), whose sum is σ = 11984993280. Its totient is φ = 6701845920.

The previous prime is 9021210097. The next prime is 9021210137. The reversal of 9021210121 is 1210121209.

It is a happy number.

It is not a de Polignac number, because 9021210121 - 2⁷ = 9021209993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9021210161) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4449510 + ... + 4451536.

It is an arithmetic number, because the mean of its divisors is an integer number (249687360).

Almost surely, 2^9021210121 is an apocalyptic number.

It is an amenable number.

9021210121 is a deficient number, since it is larger than the sum of its proper divisors (2963783159).

9021210121 is a wasteful number, since it uses less digits than its factorization.

9021210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2434 (or 2427 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 9021210121 is about 94980.0511739176. The cubic root of 9021210121 is about 2081.7165718257.

The spelling of 9021210121 in words is "nine billion, twenty-one million, two hundred ten thousand, one hundred twenty-one".