2181342020137 has 8 divisors (see below), whose sum is σ = 2492981105472. Its totient is φ = 1869707634000.

The previous prime is 2181342020119. The next prime is 2181342020141. The reversal of 2181342020137 is 7310202431812.

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 2181342020137 - 2⁷ = 2181342020009 is a prime.

It is a super-2 number, since 2×2181342020137² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2181342020107) 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, 116539 + ... + 2091952.

It is an arithmetic number, because the mean of its divisors is an integer number (311622638184).

Almost surely, 2^{2181342020137} is an apocalyptic number.

It is an amenable number.

2181342020137 is a deficient number, since it is larger than the sum of its proper divisors (311639085335).

2181342020137 is a wasteful number, since it uses less digits than its factorization.

2181342020137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349599.

The product of its (nonzero) digits is 16128, while the sum is 34.

Adding to 2181342020137 its reverse (7310202431812), we get a palindrome (9491544451949).

The spelling of 2181342020137 in words is "two trillion, one hundred eighty-one billion, three hundred forty-two million, twenty thousand, one hundred thirty-seven".