21121212202022 has 16 divisors (see below), whose sum is σ = 32306200023600. Its totient is φ = 10352807398752.

The previous prime is 21121212202007. The next prime is 21121212202121. The reversal of 21121212202022 is 22020221212112.

It is a super-2 number, since 2×21121212202022² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121212201985 and 21121212202003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82005272 + ... + 82262427.

It is an arithmetic number, because the mean of its divisors is an integer number (2019137501475).

Almost surely, 2^{21121212202022} is an apocalyptic number.

21121212202022 is a deficient number, since it is larger than the sum of its proper divisors (11184987821578).

21121212202022 is a wasteful number, since it uses less digits than its factorization.

21121212202022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164268967.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21121212202022 its reverse (22020221212112), we get a palindrome (43141433414134).

The spelling of 21121212202022 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred twelve million, two hundred two thousand, twenty-two".