1001210122220 has 144 divisors (see below), whose sum is σ = 2680632917760. Its totient is φ = 307407450240.

The previous prime is 1001210122177. The next prime is 1001210122223. The reversal of 1001210122220 is 222210121001.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 1001210122195 and 1001210122204.

It is not an unprimeable number, because it can be changed into a prime (1001210122223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 693911 + ... + 1576049.

Almost surely, 2^{1001210122220} is an apocalyptic number.

1001210122220 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 1001210122220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1340316458880).

1001210122220 is an abundant number, since it is smaller than the sum of its proper divisors (1679422795540).

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

1001210122220 is a wasteful number, since it uses less digits than its factorization.

1001210122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882244 (or 882231 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1001210122220 its reverse (222210121001), we get a palindrome (1223420243221).

The spelling of 1001210122220 in words is "one trillion, one billion, two hundred ten million, one hundred twenty-two thousand, two hundred twenty".