1201202220100 has 72 divisors (see below), whose sum is σ = 2620789099040. Its totient is φ = 477868308480.

The previous prime is 1201202219993. The next prime is 1201202220121. The reversal of 1201202220100 is 10222021021.

It is a happy number.

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, 127741999 + ... + 127751401.

Almost surely, 2^{1201202220100} is an apocalyptic number.

1201202220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201202220100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1310394549520).

1201202220100 is an abundant number, since it is smaller than the sum of its proper divisors (1419586878940).

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

1201202220100 is a wasteful number, since it uses less digits than its factorization.

1201202220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16229 (or 16222 counting only the distinct ones).

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

Adding to 1201202220100 its reverse (10222021021), we get a palindrome (1211424241121).

The spelling of 1201202220100 in words is "one trillion, two hundred one billion, two hundred two million, two hundred twenty thousand, one hundred".