1021262138209 has 8 divisors (see below), whose sum is σ = 1027526599008. Its totient is φ = 1015015104000.

The previous prime is 1021262138201. The next prime is 1021262138231. The reversal of 1021262138209 is 9028312621201.

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 1021262138209 - 2³ = 1021262138201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021262138201) 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, 4239072 + ... + 4473505.

It is an arithmetic number, because the mean of its divisors is an integer number (128440824876).

Almost surely, 2^{1021262138209} is an apocalyptic number.

It is an amenable number.

1021262138209 is a deficient number, since it is larger than the sum of its proper divisors (6264460799).

1021262138209 is an equidigital number, since it uses as much as digits as its factorization.

1021262138209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8713295.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 1021262138209 in words is "one trillion, twenty-one billion, two hundred sixty-two million, one hundred thirty-eight thousand, two hundred nine".