1212210220020 has 24 divisors (see below), whose sum is σ = 3394188616224. Its totient is φ = 323256058656.

The previous prime is 1212210220019. The next prime is 1212210220021. The reversal of 1212210220020 is 200220122121.

It is an interprime number because it is at equal distance from previous prime (1212210220019) and next prime (1212210220021).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212210220021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10101751774 + ... + 10101751893.

It is an arithmetic number, because the mean of its divisors is an integer number (141424525676).

Almost surely, 2^{1212210220020} is an apocalyptic number.

1212210220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212210220020 is an abundant number, since it is smaller than the sum of its proper divisors (2181978396204).

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

1212210220020 is a wasteful number, since it uses less digits than its factorization.

1212210220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20203503679 (or 20203503677 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1212210220020 its reverse (200220122121), we get a palindrome (1412430342141).

The spelling of 1212210220020 in words is "one trillion, two hundred twelve billion, two hundred ten million, two hundred twenty thousand, twenty".