1211210102121 has 8 divisors (see below), whose sum is σ = 1616101166400. Its totient is φ = 806896219632.

The previous prime is 1211210102107. The next prime is 1211210102171. The reversal of 1211210102121 is 1212010121121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1211210102121 - 2⁷ = 1211210101993 is a prime.

It is a super-2 number, since 2×1211210102121² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1211210102121.

It is not an unprimeable number, because it can be changed into a prime (1211210102171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144290550 + ... + 144298943.

It is an arithmetic number, because the mean of its divisors is an integer number (202012645800).

Almost surely, 2^{1211210102121} is an apocalyptic number.

It is an amenable number.

1211210102121 is a deficient number, since it is larger than the sum of its proper divisors (404891064279).

1211210102121 is a wasteful number, since it uses less digits than its factorization.

1211210102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288590895.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1211210102121 its reverse (1212010121121), we get a palindrome (2423220223242).

The spelling of 1211210102121 in words is "one trillion, two hundred eleven billion, two hundred ten million, one hundred two thousand, one hundred twenty-one".