221212100121011 has 16 divisors (see below), whose sum is σ = 223463130009600. Its totient is φ = 218963069918208.

The previous prime is 221212100120909. The next prime is 221212100121083. The reversal of 221212100121011 is 110121001212122.

221212100121011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 221212100121011 - 2²² = 221212095926707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221212100121091) 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, 7481202035 + ... + 7481231603.

It is an arithmetic number, because the mean of its divisors is an integer number (13966445625600).

Almost surely, 2^{221212100121011} is an apocalyptic number.

221212100121011 is a deficient number, since it is larger than the sum of its proper divisors (2251029888589).

221212100121011 is a wasteful number, since it uses less digits than its factorization.

221212100121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60818.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221212100121011 its reverse (110121001212122), we get a palindrome (331333101333133).

The spelling of 221212100121011 in words is "two hundred twenty-one trillion, two hundred twelve billion, one hundred million, one hundred twenty-one thousand, eleven".