21134210234140 has 24 divisors (see below), whose sum is σ = 44575648669440. Its totient is φ = 8416768440768.

The previous prime is 21134210234129. The next prime is 21134210234143. The reversal of 21134210234140 is 4143201243112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21134210234099 and 21134210234108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134210234143) 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, 2307223612 + ... + 2307232771.

It is an arithmetic number, because the mean of its divisors is an integer number (1857318694560).

Almost surely, 2^{21134210234140} is an apocalyptic number.

21134210234140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21134210234140 is an abundant number, since it is smaller than the sum of its proper divisors (23441438435300).

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

21134210234140 is a wasteful number, since it uses less digits than its factorization.

21134210234140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4614456621 (or 4614456619 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 21134210234140 its reverse (4143201243112), we get a palindrome (25277411477252).

The spelling of 21134210234140 in words is "twenty-one trillion, one hundred thirty-four billion, two hundred ten million, two hundred thirty-four thousand, one hundred forty".