1000122021109 has 16 divisors (see below), whose sum is σ = 1070245864960. Its totient is φ = 931753368000.

The previous prime is 1000122021103. The next prime is 1000122021121. The reversal of 1000122021109 is 9011202210001.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1000122021109 - 2²³ = 1000113632501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000122021103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5509819 + ... + 5688439.

It is an arithmetic number, because the mean of its divisors is an integer number (66890366560).

Almost surely, 2^{1000122021109} is an apocalyptic number.

1000122021109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1000122021109 is a deficient number, since it is larger than the sum of its proper divisors (70123843851).

1000122021109 is a wasteful number, since it uses less digits than its factorization.

1000122021109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183532.

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

The spelling of 1000122021109 in words is "one trillion, one hundred twenty-two million, twenty-one thousand, one hundred nine".