1201020001220 has 192 divisors, whose sum is σ = 2824616261376. Its totient is φ = 426165442560.

The previous prime is 1201020001193. The next prime is 1201020001231. The reversal of 1201020001220 is 221000201021.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 167106467 + ... + 167113653.

It is an arithmetic number, because the mean of its divisors is an integer number (14711543028).

Almost surely, 2^{1201020001220} is an apocalyptic number.

1201020001220 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 1201020001220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1412308130688).

1201020001220 is an abundant number, since it is smaller than the sum of its proper divisors (1623596260156).

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

1201020001220 is a wasteful number, since it uses less digits than its factorization.

1201020001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7510 (or 7508 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1201020001220 its reverse (221000201021), we get a palindrome (1422020202241).

The spelling of 1201020001220 in words is "one trillion, two hundred one billion, twenty million, one thousand, two hundred twenty".