1212210221020 has 12 divisors (see below), whose sum is σ = 2545641464184. Its totient is φ = 484884088400.

The previous prime is 1212210221009. The next prime is 1212210221041. The reversal of 1212210221020 is 201220122121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1212210220985 and 1212210221003.

It is a congruent number.

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, 30305255506 + ... + 30305255545.

It is an arithmetic number, because the mean of its divisors is an integer number (212136788682).

Almost surely, 2^{1212210221020} is an apocalyptic number.

1212210221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212210221020 is an abundant number, since it is smaller than the sum of its proper divisors (1333431243164).

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

1212210221020 is a wasteful number, since it uses less digits than its factorization.

1212210221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60610511060 (or 60610511058 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1212210221020 its reverse (201220122121), we get a palindrome (1413430343141).

The spelling of 1212210221020 in words is "one trillion, two hundred twelve billion, two hundred ten million, two hundred twenty-one thousand, twenty".