211110212001209 has 16 divisors (see below), whose sum is σ = 223709419718928. Its totient is φ = 198531175729152.

The previous prime is 211110212001193. The next prime is 211110212001217. The reversal of 211110212001209 is 902100212011112.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2117738010025 + 208992473991184 = 1455245^2 + 14456572^2 .

It is not a de Polignac number, because 211110212001209 - 2⁴ = 211110212001193 is a prime.

It is a super-2 number, since 2×211110212001209² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211110212021209) 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, 103524407 + ... + 105543939.

It is an arithmetic number, because the mean of its divisors is an integer number (13981838732433).

Almost surely, 2^{211110212001209} is an apocalyptic number.

It is an amenable number.

211110212001209 is a deficient number, since it is larger than the sum of its proper divisors (12599207717719).

211110212001209 is a wasteful number, since it uses less digits than its factorization.

211110212001209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024524.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 211110212001209 in words is "two hundred eleven trillion, one hundred ten billion, two hundred twelve million, one thousand, two hundred nine".