21120212121022 has 16 divisors (see below), whose sum is σ = 36356310616032. Its totient is φ = 9013961306880.

The previous prime is 21120212120831. The next prime is 21120212121131. The reversal of 21120212121022 is 22012121202112.

It is a super-3 number, since 3×21120212121022³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3129844303 + ... + 3129851050.

It is an arithmetic number, because the mean of its divisors is an integer number (2272269413502).

Almost surely, 2^{21120212121022} is an apocalyptic number.

21120212121022 is a deficient number, since it is larger than the sum of its proper divisors (15236098495010).

21120212121022 is a wasteful number, since it uses less digits than its factorization.

21120212121022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6259695603.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21120212121022 its reverse (22012121202112), we get a palindrome (43132333323134).

The spelling of 21120212121022 in words is "twenty-one trillion, one hundred twenty billion, two hundred twelve million, one hundred twenty-one thousand, twenty-two".