1000020212120 has 128 divisors (see below), whose sum is σ = 2493893836800. Its totient is φ = 359201740800.

The previous prime is 1000020212077. The next prime is 1000020212189. The reversal of 1000020212120 is 212120200001.

It is a happy number.

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, 1162601 + ... + 1830759.

It is an arithmetic number, because the mean of its divisors is an integer number (19483545600).

Almost surely, 2^{1000020212120} is an apocalyptic number.

1000020212120 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 1000020212120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1246946918400).

1000020212120 is an abundant number, since it is smaller than the sum of its proper divisors (1493873624680).

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

1000020212120 is a wasteful number, since it uses less digits than its factorization.

1000020212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668289 (or 668285 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1000020212120 its reverse (212120200001), we get a palindrome (1212140412121).

The spelling of 1000020212120 in words is "one trillion, twenty million, two hundred twelve thousand, one hundred twenty".