21122012020202 has 8 divisors (see below), whose sum is σ = 33546724973316. Its totient is φ = 9939770362432.

The previous prime is 21122012020189. The next prime is 21122012020259. The reversal of 21122012020202 is 20202021022112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20938869961801 + 183142058401 = 4575901^2 + 427951^2 .

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

It is a super-2 number, since 2×21122012020202² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

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, 310617823793 + ... + 310617823860.

Almost surely, 2^{21122012020202} is an apocalyptic number.

21122012020202 is a deficient number, since it is larger than the sum of its proper divisors (12424712953114).

21122012020202 is a wasteful number, since it uses less digits than its factorization.

21122012020202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621235647672.

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

Adding to 21122012020202 its reverse (20202021022112), we get a palindrome (41324033042314).

The spelling of 21122012020202 in words is "twenty-one trillion, one hundred twenty-two billion, twelve million, twenty thousand, two hundred two".