1212201111020 has 12 divisors (see below), whose sum is σ = 2545622333184. Its totient is φ = 484880444400.

The previous prime is 1212201110963. The next prime is 1212201111061. The reversal of 1212201111020 is 201111022121.

It is a junction number, because it is equal to n+sod(n) for n = 1212201110986 and 1212201111004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30305027756 + ... + 30305027795.

It is an arithmetic number, because the mean of its divisors is an integer number (212135194432).

Almost surely, 2^{1212201111020} is an apocalyptic number.

1212201111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212201111020 is an abundant number, since it is smaller than the sum of its proper divisors (1333421222164).

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

1212201111020 is a wasteful number, since it uses less digits than its factorization.

1212201111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60610055560 (or 60610055558 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1212201111020 its reverse (201111022121), we get a palindrome (1413312133141).

The spelling of 1212201111020 in words is "one trillion, two hundred twelve billion, two hundred one million, one hundred eleven thousand, twenty".