1912221212021 has 8 divisors (see below), whose sum is σ = 1912904532000. Its totient is φ = 1911537991440.

The previous prime is 1912221211969. The next prime is 1912221212063. The reversal of 1912221212021 is 1202121222191.

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 1912221212021 - 2²² = 1912217017717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1912221212921) 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, 70649831 + ... + 70676891.

It is an arithmetic number, because the mean of its divisors is an integer number (239113066500).

Almost surely, 2^{1912221212021} is an apocalyptic number.

It is an amenable number.

1912221212021 is a deficient number, since it is larger than the sum of its proper divisors (683319979).

1912221212021 is a wasteful number, since it uses less digits than its factorization.

1912221212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49699.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 1912221212021 in words is "one trillion, nine hundred twelve billion, two hundred twenty-one million, two hundred twelve thousand, twenty-one".