23212122230640 has 320 divisors, whose sum is σ = 85855389474816. Its totient is φ = 5072427672576.

The previous prime is 23212122230639. The next prime is 23212122230651. The reversal of 23212122230640 is 4603222121232.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 23212122230598 and 23212122230607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 78175099 + ... + 78471461.

Almost surely, 2^{23212122230640} is an apocalyptic number.

23212122230640 is a gapful number since it is divisible by the number (20) 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 23212122230640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42927694737408).

23212122230640 is an abundant number, since it is smaller than the sum of its proper divisors (62643267244176).

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

23212122230640 is a wasteful number, since it uses less digits than its factorization.

23212122230640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298436 (or 298430 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 23212122230640 its reverse (4603222121232), we get a palindrome (27815344351872).

The spelling of 23212122230640 in words is "twenty-three trillion, two hundred twelve billion, one hundred twenty-two million, two hundred thirty thousand, six hundred forty".