1212122222101 has 16 divisors (see below), whose sum is σ = 1390391267328. Its totient is φ = 1035134535600.

The previous prime is 1212122222099. The next prime is 1212122222123. The reversal of 1212122222101 is 1012222212121.

It is a cyclic number.

It is not a de Polignac number, because 1212122222101 - 2¹ = 1212122222099 is a prime.

It is a super-2 number, since 2×1212122222101² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212122262101) 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, 3327876 + ... + 3674098.

It is an arithmetic number, because the mean of its divisors is an integer number (86899454208).

Almost surely, 2^{1212122222101} is an apocalyptic number.

It is an amenable number.

1212122222101 is a deficient number, since it is larger than the sum of its proper divisors (178269045227).

1212122222101 is a wasteful number, since it uses less digits than its factorization.

1212122222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348072.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1212122222101 its reverse (1012222212121), we get a palindrome (2224344434222).

The spelling of 1212122222101 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, two hundred twenty-two thousand, one hundred one".