1211210000121 has 12 divisors (see below), whose sum is σ = 1775106667376. Its totient is φ = 734066666520.

The previous prime is 1211210000107. The next prime is 1211210000149. The reversal of 1211210000121 is 1210000121121.

It is not a de Polignac number, because 1211210000121 - 2²⁷ = 1211075782393 is a prime.

It is a super-2 number, since 2×1211210000121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211210000097 and 1211210000106.

It is not an unprimeable number, because it can be changed into a prime (1211210000621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1668332971 + ... + 1668333696.

Almost surely, 2^{1211210000121} is an apocalyptic number.

1211210000121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211210000121 is a deficient number, since it is larger than the sum of its proper divisors (563896667255).

1211210000121 is a wasteful number, since it uses less digits than its factorization.

1211210000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3336666692 (or 3336666681 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1211210000121 its reverse (1210000121121), we get a palindrome (2421210121242).

It can be divided in two parts, 121 and 1210000121, that multiplied together give a palindrome (146410014641).

The spelling of 1211210000121 in words is "one trillion, two hundred eleven billion, two hundred ten million, one hundred twenty-one", and thus it is an aban number.