21133240140040 has 32 divisors (see below), whose sum is σ = 54342617503680. Its totient is φ = 7245682333632.

The previous prime is 21133240140037. The next prime is 21133240140041. The reversal of 21133240140040 is 4004104233112.

It is a super-2 number, since 2×21133240140040² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21133240139987 and 21133240140014.

It is not an unprimeable number, because it can be changed into a prime (21133240140041) 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, 37737928542 + ... + 37737929101.

It is an arithmetic number, because the mean of its divisors is an integer number (1698206796990).

Almost surely, 2^{21133240140040} is an apocalyptic number.

21133240140040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21133240140040 is an abundant number, since it is smaller than the sum of its proper divisors (33209377363640).

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

21133240140040 is a wasteful number, since it uses less digits than its factorization.

21133240140040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75475857661 (or 75475857657 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21133240140040 its reverse (4004104233112), we get a palindrome (25137344373152).

The spelling of 21133240140040 in words is "twenty-one trillion, one hundred thirty-three billion, two hundred forty million, one hundred forty thousand, forty".