1201211220220 has 48 divisors (see below), whose sum is σ = 2785020755328. Its totient is φ = 431541373760.

The previous prime is 1201211220179. The next prime is 1201211220247. The reversal of 1201211220220 is 220221121021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1201211220194 and 1201211220203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32873614 + ... + 32910133.

It is an arithmetic number, because the mean of its divisors is an integer number (58021265736).

Almost surely, 2^{1201211220220} is an apocalyptic number.

1201211220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201211220220 is an abundant number, since it is smaller than the sum of its proper divisors (1583809535108).

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

1201211220220 is a wasteful number, since it uses less digits than its factorization.

1201211220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65783850 (or 65783848 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1201211220220 its reverse (220221121021), we get a palindrome (1421432341241).

The spelling of 1201211220220 in words is "one trillion, two hundred one billion, two hundred eleven million, two hundred twenty thousand, two hundred twenty".