201021221122 has 8 divisors (see below), whose sum is σ = 301650133500. Its totient is φ = 100471176624.

The previous prime is 201021220993. The next prime is 201021221161. The reversal of 201021221122 is 221122120102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 200765828761 + 255392361 = 448069^2 + 15981^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 201021221096 and 201021221105.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19710597 + ... + 19720792.

Almost surely, 2^201021221122 is an apocalyptic number.

201021221122 is a deficient number, since it is larger than the sum of its proper divisors (100628912378).

201021221122 is a wasteful number, since it uses less digits than its factorization.

201021221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39433940.

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

Adding to 201021221122 its reverse (221122120102), we get a palindrome (422143341224).

The spelling of 201021221122 in words is "two hundred one billion, twenty-one million, two hundred twenty-one thousand, one hundred twenty-two".