21000122121219 has 32 divisors (see below), whose sum is σ = 29526934752000. Its totient is φ = 13256497398144.

The previous prime is 21000122121191. The next prime is 21000122121227. The reversal of 21000122121219 is 91212122100012.

It is not a de Polignac number, because 21000122121219 - 2⁷ = 21000122121091 is a prime.

It is a super-2 number, since 2×21000122121219² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21000122121019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2731372 + ... + 7032825.

It is an arithmetic number, because the mean of its divisors is an integer number (922716711000).

Almost surely, 2^{21000122121219} is an apocalyptic number.

21000122121219 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

21000122121219 is a deficient number, since it is larger than the sum of its proper divisors (8526812630781).

21000122121219 is a wasteful number, since it uses less digits than its factorization.

21000122121219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9764707.

The product of its (nonzero) digits is 288, while the sum is 24.

The spelling of 21000122121219 in words is "twenty-one trillion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred nineteen".