211144320123451 has 64 divisors (see below), whose sum is σ = 251375192764416. Its totient is φ = 174826085990400.

The previous prime is 211144320123427. The next prime is 211144320123469. The reversal of 211144320123451 is 154321023441112.

It is not a de Polignac number, because 211144320123451 - 2¹¹ = 211144320121403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211144320123151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8363132310 + ... + 8363157556.

It is an arithmetic number, because the mean of its divisors is an integer number (3927737386944).

Almost surely, 2^{211144320123451} is an apocalyptic number.

211144320123451 is a deficient number, since it is larger than the sum of its proper divisors (40230872640965).

211144320123451 is a wasteful number, since it uses less digits than its factorization.

211144320123451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27172.

The product of its (nonzero) digits is 23040, while the sum is 34.

Adding to 211144320123451 its reverse (154321023441112), we get a palindrome (365465343564563).

The spelling of 211144320123451 in words is "two hundred eleven trillion, one hundred forty-four billion, three hundred twenty million, one hundred twenty-three thousand, four hundred fifty-one".