21375575122 has 16 divisors (see below), whose sum is σ = 34992990144. Its totient is φ = 9712066000.

The previous prime is 21375575119. The next prime is 21375575129. The reversal of 21375575122 is 22157557312.

It is not an unprimeable number, because it can be changed into a prime (21375575129) 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, 151654 + ... + 256417.

It is an arithmetic number, because the mean of its divisors is an integer number (2187061884).

Almost surely, 2^21375575122 is an apocalyptic number.

21375575122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21375575122 is a deficient number, since it is larger than the sum of its proper divisors (13617415022).

21375575122 is a wasteful number, since it uses less digits than its factorization.

21375575122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410465.

The product of its digits is 147000, while the sum is 40.

The spelling of 21375575122 in words is "twenty-one billion, three hundred seventy-five million, five hundred seventy-five thousand, one hundred twenty-two".