1000101212220 has 96 divisors (see below), whose sum is σ = 3055891587840. Its totient is φ = 242366479360.

The previous prime is 1000101212183. The next prime is 1000101212239. The reversal of 1000101212220 is 222121010001.

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 = 1000101212196 and 1000101212205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1699876 + ... + 2211284.

It is an arithmetic number, because the mean of its divisors is an integer number (31832204040).

Almost surely, 2^{1000101212220} is an apocalyptic number.

1000101212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000101212220 is an abundant number, since it is smaller than the sum of its proper divisors (2055790375620).

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

1000101212220 is a wasteful number, since it uses less digits than its factorization.

1000101212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514395 (or 514393 counting only the distinct ones).

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

Adding to 1000101212220 its reverse (222121010001), we get a palindrome (1222222222221).

The spelling of 1000101212220 in words is "one trillion, one hundred one million, two hundred twelve thousand, two hundred twenty".