121312220002210 has 16 divisors (see below), whose sum is σ = 218426428639800. Its totient is φ = 48510569637376.

The previous prime is 121312220002157. The next prime is 121312220002319. The reversal of 121312220002210 is 12200022213121.

It can be written as a sum of positive squares in 4 ways, for example, as 118881798243849 + 2430421758361 = 10903293^2 + 1558981^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1789759855 + ... + 1789827634.

Almost surely, 2^{121312220002210} is an apocalyptic number.

121312220002210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121312220002210 is a deficient number, since it is larger than the sum of its proper divisors (97114208637590).

121312220002210 is a wasteful number, since it uses less digits than its factorization.

121312220002210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3579590885.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 121312220002210 its reverse (12200022213121), we get a palindrome (133512242215331).

The spelling of 121312220002210 in words is "one hundred twenty-one trillion, three hundred twelve billion, two hundred twenty million, two thousand, two hundred ten".