1212220211101 has 16 divisors (see below), whose sum is σ = 1218096158400. Its totient is φ = 1206361859328.

The previous prime is 1212220211099. The next prime is 1212220211123. The reversal of 1212220211101 is 1011120222121.

It is a cyclic number.

It is not a de Polignac number, because 1212220211101 - 2¹ = 1212220211099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212220211201) 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, 492971610 + ... + 492974068.

It is an arithmetic number, because the mean of its divisors is an integer number (76131009900).

Almost surely, 2^{1212220211101} is an apocalyptic number.

It is an amenable number.

1212220211101 is a deficient number, since it is larger than the sum of its proper divisors (5875947299).

1212220211101 is a wasteful number, since it uses less digits than its factorization.

1212220211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5148.

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

Adding to 1212220211101 its reverse (1011120222121), we get a palindrome (2223340433222).

The spelling of 1212220211101 in words is "one trillion, two hundred twelve billion, two hundred twenty million, two hundred eleven thousand, one hundred one".