1022121112109 has 2 divisors, whose sum is σ = 1022121112110. Its totient is φ = 1022121112108.

The previous prime is 1022121112093. The next prime is 1022121112223. The reversal of 1022121112109 is 9012111212201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 793257422500 + 228863689609 = 890650^2 + 478397^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022121112109 - 2⁴ = 1022121112093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022121192109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511060556054 + 511060556055.

It is an arithmetic number, because the mean of its divisors is an integer number (511060556055).

Almost surely, 2^{1022121112109} is an apocalyptic number.

It is an amenable number.

1022121112109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022121112109 is an equidigital number, since it uses as much as digits as its factorization.

1022121112109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 1022121112109 in words is "one trillion, twenty-two billion, one hundred twenty-one million, one hundred twelve thousand, one hundred nine".