201021202100122 has 4 divisors (see below), whose sum is σ = 301531803150186. Its totient is φ = 100510601050060.

The previous prime is 201021202100077. The next prime is 201021202100137. The reversal of 201021202100122 is 221001202120102.

It is a happy number.

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., 123521685068961 + 77499517031161 = 11114031^2 + 8803381^2 .

It is a junction number, because it is equal to n+sod(n) for n = 201021202100096 and 201021202100105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50255300525029 + ... + 50255300525032.

Almost surely, 2^{201021202100122} is an apocalyptic number.

201021202100122 is a deficient number, since it is larger than the sum of its proper divisors (100510601050064).

201021202100122 is a wasteful number, since it uses less digits than its factorization.

201021202100122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100510601050063.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 201021202100122 its reverse (221001202120102), we get a palindrome (422022404220224).

The spelling of 201021202100122 in words is "two hundred one trillion, twenty-one billion, two hundred two million, one hundred thousand, one hundred twenty-two".