1201102001220 has 216 divisors, whose sum is σ = 3864337420608. Its totient is φ = 278515515520.

The previous prime is 1201102001207. The next prime is 1201102001299. The reversal of 1201102001220 is 221002011021.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1201102001196 and 1201102001205.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3684169 + ... + 3996911.

Almost surely, 2^{1201102001220} is an apocalyptic number.

1201102001220 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 1201102001220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1932168710304).

1201102001220 is an abundant number, since it is smaller than the sum of its proper divisors (2663235419388).

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

1201102001220 is a wasteful number, since it uses less digits than its factorization.

1201102001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312823 (or 312787 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1201102001220 its reverse (221002011021), we get a palindrome (1422104012241).

The spelling of 1201102001220 in words is "one trillion, two hundred one billion, one hundred two million, one thousand, two hundred twenty".