1022001201220 has 12 divisors (see below), whose sum is σ = 2146202522604. Its totient is φ = 408800480480.

The previous prime is 1022001201217. The next prime is 1022001201227. The reversal of 1022001201220 is 221021002201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 341151782724 + 680849418496 = 584082^2 + 825136^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1022001201220.

It is not an unprimeable number, because it can be changed into a prime (1022001201227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25550030011 + ... + 25550030050.

It is an arithmetic number, because the mean of its divisors is an integer number (178850210217).

Almost surely, 2^{1022001201220} is an apocalyptic number.

1022001201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1022001201220 is an abundant number, since it is smaller than the sum of its proper divisors (1124201321384).

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

1022001201220 is a wasteful number, since it uses less digits than its factorization.

1022001201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51100060070 (or 51100060068 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1022001201220 its reverse (221021002201), we get a palindrome (1243022203421).

It can be divided in two parts, 1022001 and 201220, that added together give a palindrome (1223221).

The spelling of 1022001201220 in words is "one trillion, twenty-two billion, one million, two hundred one thousand, two hundred twenty".