1021121011209 has 12 divisors (see below), whose sum is σ = 1474281224016. Its totient is φ = 628382160432.

The previous prime is 1021121011189. The next prime is 1021121011217. The reversal of 1021121011209 is 9021101211201.

It is not a de Polignac number, because 1021121011209 - 2¹³ = 1021121003017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021121011289) 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 11 ways as a sum of consecutive naturals, for example, 1007022187 + ... + 1007023200.

It is an arithmetic number, because the mean of its divisors is an integer number (122856768668).

Almost surely, 2^{1021121011209} is an apocalyptic number.

It is an amenable number.

1021121011209 is a deficient number, since it is larger than the sum of its proper divisors (453160212807).

1021121011209 is a wasteful number, since it uses less digits than its factorization.

1021121011209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2014045416 (or 2014045403 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 21.

The spelling of 1021121011209 in words is "one trillion, twenty-one billion, one hundred twenty-one million, eleven thousand, two hundred nine".