21221012100219 has 16 divisors (see below), whose sum is σ = 28496960997120. Its totient is φ = 14046341905440.

The previous prime is 21221012100217. The next prime is 21221012100317. The reversal of 21221012100219 is 91200121012212.

It is not a de Polignac number, because 21221012100219 - 2¹ = 21221012100217 is a prime.

It is a super-2 number, since 2×21221012100219² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21221012100217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16841679 + ... + 18057800.

It is an arithmetic number, because the mean of its divisors is an integer number (1781060062320).

Almost surely, 2^{21221012100219} is an apocalyptic number.

21221012100219 is a deficient number, since it is larger than the sum of its proper divisors (7275948896901).

21221012100219 is a wasteful number, since it uses less digits than its factorization.

21221012100219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34900930.

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

The spelling of 21221012100219 in words is "twenty-one trillion, two hundred twenty-one billion, twelve million, one hundred thousand, two hundred nineteen".