1212212020210 has 32 divisors (see below), whose sum is σ = 2279571174000. Its totient is φ = 463529337600.

The previous prime is 1212212020183. The next prime is 1212212020277. The reversal of 1212212020210 is 120202122121.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 434176884241 + 778035135969 = 658921^2 + 882063^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20663985 + ... + 20722564.

Almost surely, 2^{1212212020210} is an apocalyptic number.

1212212020210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212212020210 is a deficient number, since it is larger than the sum of its proper divisors (1067359153790).

1212212020210 is a wasteful number, since it uses less digits than its factorization.

1212212020210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41386686.

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

Adding to 1212212020210 its reverse (120202122121), we get a palindrome (1332414142331).

The spelling of 1212212020210 in words is "one trillion, two hundred twelve billion, two hundred twelve million, twenty thousand, two hundred ten".