4211221423440 has 80 divisors (see below), whose sum is σ = 13055006622528. Its totient is φ = 1122973436928.

The previous prime is 4211221423427. The next prime is 4211221423469. The reversal of 4211221423440 is 443241221124.

It is a tau number, because it is divible by the number of its divisors (80).

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 = 4211221423398 and 4211221423407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19573732 + ... + 19787708.

Almost surely, 2^{4211221423440} is an apocalyptic number.

4211221423440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4211221423440 is an abundant number, since it is smaller than the sum of its proper divisors (8843785199088).

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

4211221423440 is a wasteful number, since it uses less digits than its factorization.

4211221423440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295996 (or 295990 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

Adding to 4211221423440 its reverse (443241221124), we get a palindrome (4654462644564).

The spelling of 4211221423440 in words is "four trillion, two hundred eleven billion, two hundred twenty-one million, four hundred twenty-three thousand, four hundred forty".