21122202121222 has 16 divisors (see below), whose sum is σ = 31832093272320. Its totient is φ = 10511575882632.

The previous prime is 21122202121211. The next prime is 21122202121231. The reversal of 21122202121222 is 22212120222112.

It is a super-2 number, since 2×21122202121222² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122202121193 and 21122202121202.

It is a congruent number.

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, 17288322 + ... + 18469717.

It is an arithmetic number, because the mean of its divisors is an integer number (1989505829520).

Almost surely, 2^{21122202121222} is an apocalyptic number.

21122202121222 is a deficient number, since it is larger than the sum of its proper divisors (10709891151098).

21122202121222 is a wasteful number, since it uses less digits than its factorization.

21122202121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35759427.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 21122202121222 its reverse (22212120222112), we get a palindrome (43334322343334).

The spelling of 21122202121222 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred two million, one hundred twenty-one thousand, two hundred twenty-two".