1020212120109 has 16 divisors (see below), whose sum is σ = 1674194248832. Its totient is φ = 538133865408.

The previous prime is 1020212120099. The next prime is 1020212120171. The reversal of 1020212120109 is 9010212120201.

It is not a de Polignac number, because 1020212120109 - 2⁴ = 1020212120093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020212120009) 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 15 ways as a sum of consecutive naturals, for example, 1868520094 + ... + 1868520639.

It is an arithmetic number, because the mean of its divisors is an integer number (104637140552).

Almost surely, 2^{1020212120109} is an apocalyptic number.

It is an amenable number.

1020212120109 is a deficient number, since it is larger than the sum of its proper divisors (653982128723).

1020212120109 is a wasteful number, since it uses less digits than its factorization.

1020212120109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3737040756.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 1020212120109 in words is "one trillion, twenty billion, two hundred twelve million, one hundred twenty thousand, one hundred nine".