21012200122202 has 16 divisors (see below), whose sum is σ = 31845676499520. Its totient is φ = 10397111631552.

The previous prime is 21012200122183. The next prime is 21012200122273. The reversal of 21012200122202 is 20222100221012.

It is a happy number.

It is a super-3 number, since 3×21012200122202³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33944768 + ... + 34558235.

It is an arithmetic number, because the mean of its divisors is an integer number (1990354781220).

Almost surely, 2^{21012200122202} is an apocalyptic number.

21012200122202 is a deficient number, since it is larger than the sum of its proper divisors (10833476377318).

21012200122202 is a wasteful number, since it uses less digits than its factorization.

21012200122202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68504597.

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

Adding to 21012200122202 its reverse (20222100221012), we get a palindrome (41234300343214).

The spelling of 21012200122202 in words is "twenty-one trillion, twelve billion, two hundred million, one hundred twenty-two thousand, two hundred two".