1001210221100 has 36 divisors (see below), whose sum is σ = 2179567545624. Its totient is φ = 399204574080.

The previous prime is 1001210221097. The next prime is 1001210221103. The reversal of 1001210221100 is 11220121001.

It is an interprime number because it is at equal distance from previous prime (1001210221097) and next prime (1001210221103).

It is a super-2 number, since 2×1001210221100² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1001210221103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15962474 + ... + 16025073.

It is an arithmetic number, because the mean of its divisors is an integer number (60543542934).

Almost surely, 2^{1001210221100} is an apocalyptic number.

1001210221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001210221100 is an abundant number, since it is smaller than the sum of its proper divisors (1178357324524).

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

1001210221100 is a wasteful number, since it uses less digits than its factorization.

1001210221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31987874 (or 31987867 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1001210221100 its reverse (11220121001), we get a palindrome (1012430342101).

The spelling of 1001210221100 in words is "one trillion, one billion, two hundred ten million, two hundred twenty-one thousand, one hundred".