10421212340 has 192 divisors, whose sum is σ = 29649715200. Its totient is φ = 2977689600.

The previous prime is 10421212327. The next prime is 10421212349. The reversal of 10421212340 is 4321212401.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10421212349) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 901316 + ... + 912804.

It is an arithmetic number, because the mean of its divisors is an integer number (154425600).

Almost surely, 2^10421212340 is an apocalyptic number.

10421212340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10421212340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14824857600).

10421212340 is an abundant number, since it is smaller than the sum of its proper divisors (19228502860).

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

10421212340 is a wasteful number, since it uses less digits than its factorization.

10421212340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11566 (or 11564 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 10421212340 its reverse (4321212401), we get a palindrome (14742424741).

The spelling of 10421212340 in words is "ten billion, four hundred twenty-one million, two hundred twelve thousand, three hundred forty".