1001201012220 has 48 divisors (see below), whose sum is σ = 2823530935680. Its totient is φ = 265066165056.

The previous prime is 1001201012219. The next prime is 1001201012243. The reversal of 1001201012220 is 222101021001.

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 = 1001201012196 and 1001201012205.

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, 60015702 + ... + 60032381.

It is an arithmetic number, because the mean of its divisors is an integer number (58823561160).

Almost surely, 2^{1001201012220} is an apocalyptic number.

1001201012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001201012220 is an abundant number, since it is smaller than the sum of its proper divisors (1822329923460).

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

1001201012220 is a wasteful number, since it uses less digits than its factorization.

1001201012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120048234 (or 120048232 counting only the distinct ones).

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

Adding to 1001201012220 its reverse (222101021001), we get a palindrome (1223302033221).

The spelling of 1001201012220 in words is "one trillion, one billion, two hundred one million, twelve thousand, two hundred twenty".