1212210221101 has 16 divisors (see below), whose sum is σ = 1335768033600. Its totient is φ = 1090897113600.

The previous prime is 1212210221087. The next prime is 1212210221111. The reversal of 1212210221101 is 1011220122121.

It is not a de Polignac number, because 1212210221101 - 2¹³ = 1212210212909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212210221111) 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, 844765 + ... + 1771453.

It is an arithmetic number, because the mean of its divisors is an integer number (83485502100).

Almost surely, 2^{1212210221101} is an apocalyptic number.

1212210221101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1212210221101 is a deficient number, since it is larger than the sum of its proper divisors (123557812499).

1212210221101 is a wasteful number, since it uses less digits than its factorization.

1212210221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927900.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1212210221101 its reverse (1011220122121), we get a palindrome (2223430343222).

The spelling of 1212210221101 in words is "one trillion, two hundred twelve billion, two hundred ten million, two hundred twenty-one thousand, one hundred one".