21212110000019 has 16 divisors (see below), whose sum is σ = 21367453692480. Its totient is φ = 21056967360000.

The previous prime is 21212109999991. The next prime is 21212110000021. The reversal of 21212110000019 is 91000001121212.

It is a cyclic number.

It is not a de Polignac number, because 21212110000019 - 2²⁰ = 21212108951443 is a prime.

It is a super-3 number, since 3×21212110000019³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21212110000049) 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, 2328693437 + ... + 2328702545.

It is an arithmetic number, because the mean of its divisors is an integer number (1335465855780).

Almost surely, 2^{21212110000019} is an apocalyptic number.

21212110000019 is a deficient number, since it is larger than the sum of its proper divisors (155343692461).

21212110000019 is a wasteful number, since it uses less digits than its factorization.

21212110000019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18302.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 21212110000019 in words is "twenty-one trillion, two hundred twelve billion, one hundred ten million, nineteen", and thus it is an aban number.