12021440340426 has 64 divisors (see below), whose sum is σ = 26714233036800. Its totient is φ = 3575660644800.

The previous prime is 12021440340337. The next prime is 12021440340433. The reversal of 12021440340426 is 62404304412021.

It is a super-2 number, since 2×12021440340426² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1188406 + ... + 5045313.

It is an arithmetic number, because the mean of its divisors is an integer number (417409891200).

Almost surely, 2^{12021440340426} is an apocalyptic number.

12021440340426 is an abundant number, since it is smaller than the sum of its proper divisors (14692792696374).

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

12021440340426 is a wasteful number, since it uses less digits than its factorization.

12021440340426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6234275.

The product of its (nonzero) digits is 36864, while the sum is 33.

Adding to 12021440340426 its reverse (62404304412021), we get a palindrome (74425744752447).

The spelling of 12021440340426 in words is "twelve trillion, twenty-one billion, four hundred forty million, three hundred forty thousand, four hundred twenty-six".