21122040140 has 12 divisors (see below), whose sum is σ = 44356284336. Its totient is φ = 8448816048.

The previous prime is 21122040131. The next prime is 21122040161. The reversal of 21122040140 is 4104022112.

It is a super-2 number, since 2×21122040140² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 528050984 + ... + 528051023.

It is an arithmetic number, because the mean of its divisors is an integer number (3696357028).

Almost surely, 2^21122040140 is an apocalyptic number.

21122040140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122040140 is an abundant number, since it is smaller than the sum of its proper divisors (23234244196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21122040140 is a wasteful number, since it uses less digits than its factorization.

21122040140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056102016 (or 1056102014 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21122040140 its reverse (4104022112), we get a palindrome (25226062252).

The spelling of 21122040140 in words is "twenty-one billion, one hundred twenty-two million, forty thousand, one hundred forty".