2021121042 has 8 divisors (see below), whose sum is σ = 4042242096. Its totient is φ = 673707012.

The previous prime is 2021121017. The next prime is 2021121061. The reversal of 2021121042 is 2401211202.

It is a sphenic number, since it is the product of 3 distinct primes.

2021121042 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168426748 + ... + 168426759.

It is an arithmetic number, because the mean of its divisors is an integer number (505280262).

Almost surely, 2^2021121042 is an apocalyptic number.

2021121042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021121042 is a wasteful number, since it uses less digits than its factorization.

2021121042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336853512.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2021121042 is about 44956.8798072108. The cubic root of 2021121042 is about 1264.3406692883.

Adding to 2021121042 its reverse (2401211202), we get a palindrome (4422332244).

The spelling of 2021121042 in words is "two billion, twenty-one million, one hundred twenty-one thousand, forty-two".