2101202100122 has 4 divisors (see below), whose sum is σ = 3151803150186. Its totient is φ = 1050601050060.

The previous prime is 2101202100121. The next prime is 2101202100223. The reversal of 2101202100122 is 2210012021012.

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., 1697050738681 + 404151361441 = 1302709^2 + 635729^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2101202100097 and 2101202100106.

It is not an unprimeable number, because it can be changed into a prime (2101202100121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525300525029 + ... + 525300525032.

Almost surely, 2^{2101202100122} is an apocalyptic number.

2101202100122 is a deficient number, since it is larger than the sum of its proper divisors (1050601050064).

2101202100122 is a wasteful number, since it uses less digits than its factorization.

2101202100122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050601050063.

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

Adding to 2101202100122 its reverse (2210012021012), we get a palindrome (4311214121134).

The spelling of 2101202100122 in words is "two trillion, one hundred one billion, two hundred two million, one hundred thousand, one hundred twenty-two".