1001122120220 has 24 divisors (see below), whose sum is σ = 2105224636704. Its totient is φ = 399902527296.

The previous prime is 1001122120183. The next prime is 1001122120223. The reversal of 1001122120220 is 220212211001.

It is a junction number, because it is equal to n+sod(n) for n = 1001122120195 and 1001122120204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001122120223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34130024 + ... + 34159343.

It is an arithmetic number, because the mean of its divisors is an integer number (87717693196).

Almost surely, 2^{1001122120220} is an apocalyptic number.

1001122120220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001122120220 is an abundant number, since it is smaller than the sum of its proper divisors (1104102516484).

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

1001122120220 is a wasteful number, since it uses less digits than its factorization.

1001122120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68290109 (or 68290107 counting only the distinct ones).

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

Adding to 1001122120220 its reverse (220212211001), we get a palindrome (1221334331221).

It can be divided in two parts, 1001 and 122120220, that added together give a palindrome (122121221).

The spelling of 1001122120220 in words is "one trillion, one billion, one hundred twenty-two million, one hundred twenty thousand, two hundred twenty".