21121000022022 has 16 divisors (see below), whose sum is σ = 42259816183872. Its totient is φ = 7037363984040.

The previous prime is 21121000021973. The next prime is 21121000022027. The reversal of 21121000022022 is 22022000012112.

It is a junction number, because it is equal to n+sod(n) for n = 21121000021992 and 21121000022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121000022027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 742323748 + ... + 742352199.

It is an arithmetic number, because the mean of its divisors is an integer number (2641238511492).

Almost surely, 2^{21121000022022} is an apocalyptic number.

21121000022022 is an abundant number, since it is smaller than the sum of its proper divisors (21138816161850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21121000022022 is a wasteful number, since it uses less digits than its factorization.

21121000022022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484678323.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21121000022022 its reverse (22022000012112), we get a palindrome (43143000034134).

The spelling of 21121000022022 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-two thousand, twenty-two".