21121201222022 has 64 divisors (see below), whose sum is σ = 35820489254400. Its totient is φ = 9252205159680.

The previous prime is 21121201222019. The next prime is 21121201222081. The reversal of 21121201222022 is 22022210212112.

It is a super-2 number, since 2×21121201222022² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121201221985 and 21121201222003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1015090343 + ... + 1015111149.

It is an arithmetic number, because the mean of its divisors is an integer number (559695144600).

Almost surely, 2^{21121201222022} is an apocalyptic number.

21121201222022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21121201222022 is a deficient number, since it is larger than the sum of its proper divisors (14699288032378).

21121201222022 is a wasteful number, since it uses less digits than its factorization.

21121201222022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23741.

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

Adding to 21121201222022 its reverse (22022210212112), we get a palindrome (43143411434134).

The spelling of 21121201222022 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred one million, two hundred twenty-two thousand, twenty-two".