21020222011202 has 4 divisors (see below), whose sum is σ = 31530333016806. Its totient is φ = 10510111005600.

The previous prime is 21020222011171. The next prime is 21020222011267. The reversal of 21020222011202 is 20211022202012.

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., 17120983338001 + 3899238673201 = 4137751^2 + 1974649^2 .

It is a super-3 number, since 3×21020222011202³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5255055502799 + ... + 5255055502802.

Almost surely, 2^{21020222011202} is an apocalyptic number.

21020222011202 is a deficient number, since it is larger than the sum of its proper divisors (10510111005604).

21020222011202 is a wasteful number, since it uses less digits than its factorization.

21020222011202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10510111005603.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21020222011202 its reverse (20211022202012), we get a palindrome (41231244213214).

The spelling of 21020222011202 in words is "twenty-one trillion, twenty billion, two hundred twenty-two million, eleven thousand, two hundred two".