2122212021391 has 8 divisors (see below), whose sum is σ = 2645874728064. Its totient is φ = 1653671704920.

The previous prime is 2122212021373. The next prime is 2122212021407. The reversal of 2122212021391 is 1931202122212.

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 2122212021391 - 2¹⁹ = 2122211497103 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 (2122212021691) 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 7 ways as a sum of consecutive naturals, for example, 13780597465 + ... + 13780597618.

It is an arithmetic number, because the mean of its divisors is an integer number (330734341008).

Almost surely, 2^{2122212021391} is an apocalyptic number.

2122212021391 is a deficient number, since it is larger than the sum of its proper divisors (523662706673).

2122212021391 is a wasteful number, since it uses less digits than its factorization.

2122212021391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27561195101.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 2122212021391 in words is "two trillion, one hundred twenty-two billion, two hundred twelve million, twenty-one thousand, three hundred ninety-one".