121020201020210 has 32 divisors (see below), whose sum is σ = 230824868676912. Its totient is φ = 45526056744960.

The previous prime is 121020201020179. The next prime is 121020201020231. The reversal of 121020201020210 is 12020102020121.

It can be written as a sum of positive squares in 8 ways, for example, as 74433255855841 + 46586945164369 = 8627471^2 + 6825463^2 .

It is a Curzon number.

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, 269224157 + ... + 269673296.

Almost surely, 2^{121020201020210} is an apocalyptic number.

121020201020210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121020201020210 is a deficient number, since it is larger than the sum of its proper divisors (109804667656702).

121020201020210 is a wasteful number, since it uses less digits than its factorization.

121020201020210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538898798.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121020201020210 its reverse (12020102020121), we get a palindrome (133040303040331).

The spelling of 121020201020210 in words is "one hundred twenty-one trillion, twenty billion, two hundred one million, twenty thousand, two hundred ten".