1212111200020 has 48 divisors (see below), whose sum is σ = 2909364433920. Its totient is φ = 415538475264.

The previous prime is 1212111199969. The next prime is 1212111200039. The reversal of 1212111200020 is 200021112121.

It is a super-2 number, since 2×1212111200020² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 946336 + ... + 1822024.

It is an arithmetic number, because the mean of its divisors is an integer number (60611759040).

Almost surely, 2^{1212111200020} is an apocalyptic number.

1212111200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212111200020 is an abundant number, since it is smaller than the sum of its proper divisors (1697253233900).

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

1212111200020 is a wasteful number, since it uses less digits than its factorization.

1212111200020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885592 (or 885590 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1212111200020 its reverse (200021112121), we get a palindrome (1412132312141).

It can be divided in two parts, 121211 and 1200020, that added together give a palindrome (1321231).

The spelling of 1212111200020 in words is "one trillion, two hundred twelve billion, one hundred eleven million, two hundred thousand, twenty".