21202121001202 has 8 divisors (see below), whose sum is σ = 33673956884316. Its totient is φ = 9977468706432.

The previous prime is 21202121001169. The next prime is 21202121001277. The reversal of 21202121001202 is 20210012120212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20820430569481 + 381690431721 = 4562941^2 + 617811^2 .

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

It is a super-2 number, since 2×21202121001202² (a number of 27 digits) contains 22 as substring.

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, 311795897043 + ... + 311795897110.

Almost surely, 2^{21202121001202} is an apocalyptic number.

21202121001202 is a deficient number, since it is larger than the sum of its proper divisors (12471835883114).

21202121001202 is a wasteful number, since it uses less digits than its factorization.

21202121001202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623591794172.

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

Adding to 21202121001202 its reverse (20210012120212), we get a palindrome (41412133121414).

The spelling of 21202121001202 in words is "twenty-one trillion, two hundred two billion, one hundred twenty-one million, one thousand, two hundred two".