1001022231020 has 96 divisors (see below), whose sum is σ = 2529713195520. Its totient is φ = 325039288320.

The previous prime is 1001022231007. The next prime is 1001022231023. The reversal of 1001022231020 is 201322201001.

It is a happy number.

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 = 1001022230986 and 1001022231004.

It is not an unprimeable number, because it can be changed into a prime (1001022231023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8418380 + ... + 8536460.

It is an arithmetic number, because the mean of its divisors is an integer number (26351179120).

Almost surely, 2^{1001022231020} is an apocalyptic number.

1001022231020 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 1001022231020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1264856597760).

1001022231020 is an abundant number, since it is smaller than the sum of its proper divisors (1528690964500).

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

1001022231020 is a wasteful number, since it uses less digits than its factorization.

1001022231020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121303 (or 121301 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 1001022231020 its reverse (201322201001), we get a palindrome (1202344432021).

The spelling of 1001022231020 in words is "one trillion, one billion, twenty-two million, two hundred thirty-one thousand, twenty".