1212212220010 has 48 divisors (see below), whose sum is σ = 2419601752008. Its totient is φ = 436903470080.

The previous prime is 1212212219927. The next prime is 1212212220017. The reversal of 1212212220010 is 100222122121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 598792749489 + 613419470521 = 773817^2 + 783211^2 .

It is not an unprimeable number, because it can be changed into a prime (1212212220017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4296139 + ... + 4569598.

Almost surely, 2^{1212212220010} is an apocalyptic number.

1212212220010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212212220010 is a deficient number, since it is larger than the sum of its proper divisors (1207389531998).

1212212220010 is a wasteful number, since it uses less digits than its factorization.

1212212220010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8865879 (or 8865868 counting only the distinct ones).

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

Adding to 1212212220010 its reverse (100222122121), we get a palindrome (1312434342131).

The spelling of 1212212220010 in words is "one trillion, two hundred twelve billion, two hundred twelve million, two hundred twenty thousand, ten".