9212120222021 has 8 divisors (see below), whose sum is σ = 9227131041240. Its totient is φ = 9197112166912.

The previous prime is 9212120221963. The next prime is 9212120222069. The reversal of 9212120222021 is 1202220212129.

It can be written as a sum of positive squares in 4 ways, for example, as 4719886600900 + 4492233621121 = 2172530^2 + 2119489^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9212120222021 - 2¹⁸ = 9212119959877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9212120221021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6033161 + ... + 7404273.

It is an arithmetic number, because the mean of its divisors is an integer number (1153391380155).

Almost surely, 2^{9212120222021} is an apocalyptic number.

It is an amenable number.

9212120222021 is a deficient number, since it is larger than the sum of its proper divisors (15010819219).

9212120222021 is a wasteful number, since it uses less digits than its factorization.

9212120222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382055.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 9212120222021 in words is "nine trillion, two hundred twelve billion, one hundred twenty million, two hundred twenty-two thousand, twenty-one".