1222005440000 has 100 divisors (see below), whose sum is σ = 3051054337584. Its totient is φ = 488802048000.

The previous prime is 1222005439981. The next prime is 1222005440003. The reversal of 1222005440000 is 445002221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (100).

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 (1222005440003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1589384 + ... + 2229383.

Almost surely, 2^{1222005440000} is an apocalyptic number.

1222005440000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222005440000 is an abundant number, since it is smaller than the sum of its proper divisors (1829048897584).

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

1222005440000 is an frugal number, since it uses more digits than its factorization.

1222005440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3818805 (or 3818774 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The spelling of 1222005440000 in words is "one trillion, two hundred twenty-two billion, five million, four hundred forty thousand".