1201211122220 has 24 divisors (see below), whose sum is σ = 2609527611600. Its totient is φ = 463916019392.

The previous prime is 1201211122219. The next prime is 1201211122253. The reversal of 1201211122220 is 222211121021.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1035526250 + ... + 1035527409.

It is an arithmetic number, because the mean of its divisors is an integer number (108730317150).

Almost surely, 2^{1201211122220} is an apocalyptic number.

1201211122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201211122220 is an abundant number, since it is smaller than the sum of its proper divisors (1408316489380).

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

1201211122220 is a wasteful number, since it uses less digits than its factorization.

1201211122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2071053697 (or 2071053695 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1201211122220 its reverse (222211121021), we get a palindrome (1423422243241).

The spelling of 1201211122220 in words is "one trillion, two hundred one billion, two hundred eleven million, one hundred twenty-two thousand, two hundred twenty".