21211010220009 has 8 divisors (see below), whose sum is σ = 28281369248352. Its totient is φ = 14140662335840.

The previous prime is 21211010219969. The next prime is 21211010220011. The reversal of 21211010220009 is 90002201011212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21211010220009 - 2¹⁷ = 21211010088937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21211010224009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4054222 + ... + 7671944.

It is an arithmetic number, because the mean of its divisors is an integer number (3535171156044).

Almost surely, 2^{21211010220009} is an apocalyptic number.

It is an amenable number.

21211010220009 is a deficient number, since it is larger than the sum of its proper divisors (7070359028343).

21211010220009 is a wasteful number, since it uses less digits than its factorization.

21211010220009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5572087.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 21211010220009 in words is "twenty-one trillion, two hundred eleven billion, ten million, two hundred twenty thousand, nine".