1222201222020 has 72 divisors (see below), whose sum is σ = 3807542206104. Its totient is φ = 317111666688.

The previous prime is 1222201221973. The next prime is 1222201222093. The reversal of 1222201222020 is 202221022221.

1222201222020 is a `hidden beast` number, since 1 + 222 + 201 + 2 + 220 + 20 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 161927369604 + 1060273852416 = 402402^2 + 1029696^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1222201221984 and 1222201222002.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91750189 + ... + 91763508.

Almost surely, 2^{1222201222020} is an apocalyptic number.

1222201222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222201222020 is an abundant number, since it is smaller than the sum of its proper divisors (2585340984084).

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

1222201222020 is a wasteful number, since it uses less digits than its factorization.

1222201222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183513749 (or 183513744 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 1222201222020 its reverse (202221022221), we get a palindrome (1424422244241).

The spelling of 1222201222020 in words is "one trillion, two hundred twenty-two billion, two hundred one million, two hundred twenty-two thousand, twenty".