2121231019 has 8 divisors (see below), whose sum is σ = 2156736960. Its totient is φ = 2085748800.

The previous prime is 2121231011. The next prime is 2121231029. The reversal of 2121231019 is 9101321212.

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

It is a cyclic number.

It is not a de Polignac number, because 2121231019 - 2³ = 2121231011 is a prime.

It is a super-2 number, since 2×2121231019² = 8999242071935556722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121231011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345327 + ... + 351415.

It is an arithmetic number, because the mean of its divisors is an integer number (269592120).

Almost surely, 2^2121231019 is an apocalyptic number.

2121231019 is a deficient number, since it is larger than the sum of its proper divisors (35505941).

2121231019 is an equidigital number, since it uses as much as digits as its factorization.

2121231019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11861.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 2121231019 is about 46056.8238049477. The cubic root of 2121231019 is about 1284.8802583392.

The spelling of 2121231019 in words is "two billion, one hundred twenty-one million, two hundred thirty-one thousand, nineteen".