121111202110210 has 16 divisors (see below), whose sum is σ = 234769407167736. Its totient is φ = 44717982317568.

The previous prime is 121111202110141. The next prime is 121111202110253. The reversal of 121111202110210 is 12011202111121.

It can be written as a sum of positive squares in 4 ways, for example, as 35754169111441 + 85357032998769 = 5979479^2 + 9238887^2 .

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, 465812315679 + ... + 465812315938.

Almost surely, 2^{121111202110210} is an apocalyptic number.

121111202110210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121111202110210 is a deficient number, since it is larger than the sum of its proper divisors (113658205057526).

121111202110210 is a wasteful number, since it uses less digits than its factorization.

121111202110210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931624631637.

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

Adding to 121111202110210 its reverse (12011202111121), we get a palindrome (133122404221331).

The spelling of 121111202110210 in words is "one hundred twenty-one trillion, one hundred eleven billion, two hundred two million, one hundred ten thousand, two hundred ten".