1020212111609 has 2 divisors, whose sum is σ = 1020212111610. Its totient is φ = 1020212111608.

The previous prime is 1020212111603. The next prime is 1020212111621. The reversal of 1020212111609 is 9061112120201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 575583203584 + 444628908025 = 758672^2 + 666805^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020212111609 - 2⁴ = 1020212111593 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020212111603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510106055804 + 510106055805.

It is an arithmetic number, because the mean of its divisors is an integer number (510106055805).

Almost surely, 2^{1020212111609} is an apocalyptic number.

It is an amenable number.

1020212111609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020212111609 is an equidigital number, since it uses as much as digits as its factorization.

1020212111609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 26.

The spelling of 1020212111609 in words is "one trillion, twenty billion, two hundred twelve million, one hundred eleven thousand, six hundred nine".