1000211222120 has 128 divisors (see below), whose sum is σ = 2562324192000. Its totient is φ = 347829166080.

The previous prime is 1000211222113. The next prime is 1000211222137. The reversal of 1000211222120 is 212221120001.

It is a junction number, because it is equal to n+sod(n) for n = 1000211222095 and 1000211222104.

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, 90355946 + ... + 90367014.

It is an arithmetic number, because the mean of its divisors is an integer number (20018157750).

Almost surely, 2^{1000211222120} is an apocalyptic number.

1000211222120 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 1000211222120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1281162096000).

1000211222120 is an abundant number, since it is smaller than the sum of its proper divisors (1562112969880).

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

1000211222120 is a wasteful number, since it uses less digits than its factorization.

1000211222120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20043 (or 20039 counting only the distinct ones).

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

Adding to 1000211222120 its reverse (212221120001), we get a palindrome (1212432342121).

The spelling of 1000211222120 in words is "one trillion, two hundred eleven million, two hundred twenty-two thousand, one hundred twenty".