1212102101 has 16 divisors (see below), whose sum is σ = 1399574400. Its totient is φ = 1028256768.

The previous prime is 1212102083. The next prime is 1212102109. The reversal of 1212102101 is 1012012121.

It is not a de Polignac number, because 1212102101 - 2²⁶ = 1144993237 is a prime.

It is a super-2 number, since 2×1212102101² = 2938383006497228402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212102109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 341705 + ... + 345233.

It is an arithmetic number, because the mean of its divisors is an integer number (87473400).

Almost surely, 2^1212102101 is an apocalyptic number.

It is an amenable number.

1212102101 is a deficient number, since it is larger than the sum of its proper divisors (187472299).

1212102101 is a wasteful number, since it uses less digits than its factorization.

1212102101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4028.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1212102101 is about 34815.2567274751. The cubic root of 1212102101 is about 1066.2189606266.

Adding to 1212102101 its reverse (1012012121), we get a palindrome (2224114222).

The spelling of 1212102101 in words is "one billion, two hundred twelve million, one hundred two thousand, one hundred one".