2121010101202 has 4 divisors (see below), whose sum is σ = 3181515151806. Its totient is φ = 1060505050600.

The previous prime is 2121010101187. The next prime is 2121010101209. The reversal of 2121010101202 is 2021010101212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1934160529081 + 186849572121 = 1390741^2 + 432261^2 .

It is not an unprimeable number, because it can be changed into a prime (2121010101209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530252525299 + ... + 530252525302.

Almost surely, 2^{2121010101202} is an apocalyptic number.

2121010101202 is a deficient number, since it is larger than the sum of its proper divisors (1060505050604).

2121010101202 is a wasteful number, since it uses less digits than its factorization.

2121010101202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060505050603.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2121010101202 its reverse (2021010101212), we get a palindrome (4142020202414).

The spelling of 2121010101202 in words is "two trillion, one hundred twenty-one billion, ten million, one hundred one thousand, two hundred two".