2122135638781 has 8 divisors (see below), whose sum is σ = 2125909269344. Its totient is φ = 2118365168400.

The previous prime is 2122135638761. The next prime is 2122135638859. The reversal of 2122135638781 is 1878365312212.

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 2122135638781 - 2¹⁵ = 2122135606013 is a prime.

It is a super-2 number, since 2×2122135638781² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122135638761) 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, 556231 + ... + 2133931.

It is an arithmetic number, because the mean of its divisors is an integer number (265738658668).

Almost surely, 2^{2122135638781} is an apocalyptic number.

It is an amenable number.

2122135638781 is a deficient number, since it is larger than the sum of its proper divisors (3773630563).

2122135638781 is a wasteful number, since it uses less digits than its factorization.

2122135638781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580091.

The product of its digits is 967680, while the sum is 49.

The spelling of 2122135638781 in words is "two trillion, one hundred twenty-two billion, one hundred thirty-five million, six hundred thirty-eight thousand, seven hundred eighty-one".