1022121020109 has 16 divisors (see below), whose sum is σ = 1590656421888. Its totient is φ = 571642150512.

The previous prime is 1022121020087. The next prime is 1022121020131. The reversal of 1022121020109 is 9010201212201.

It is an interprime number because it is at equal distance from previous prime (1022121020087) and next prime (1022121020131).

It is not a de Polignac number, because 1022121020109 - 2¹⁶ = 1022120954573 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022121020149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517790817 + ... + 517792790.

It is an arithmetic number, because the mean of its divisors is an integer number (99416026368).

Almost surely, 2^{1022121020109} is an apocalyptic number.

It is an amenable number.

1022121020109 is a deficient number, since it is larger than the sum of its proper divisors (568535401779).

1022121020109 is a wasteful number, since it uses less digits than its factorization.

1022121020109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035583664.

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

The spelling of 1022121020109 in words is "one trillion, twenty-two billion, one hundred twenty-one million, twenty thousand, one hundred nine".