1210000121121 has 48 divisors (see below), whose sum is σ = 1878371776512. Its totient is φ = 689929827840.

The previous prime is 1210000121089. The next prime is 1210000121123. The reversal of 1210000121121 is 1211210000121.

It is not a de Polignac number, because 1210000121121 - 2⁵ = 1210000121089 is a prime.

It is a super-2 number, since 2×1210000121121² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1210000121097 and 1210000121106.

It is not an unprimeable number, because it can be changed into a prime (1210000121123) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16544991 + ... + 16617963.

It is an arithmetic number, because the mean of its divisors is an integer number (39132745344).

Almost surely, 2^{1210000121121} is an apocalyptic number.

1210000121121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1210000121121 is a deficient number, since it is larger than the sum of its proper divisors (668371655391).

1210000121121 is a wasteful number, since it uses less digits than its factorization.

1210000121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75702 (or 75691 counting only the distinct ones).

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

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

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

The spelling of 1210000121121 in words is "one trillion, two hundred ten billion, one hundred twenty-one thousand, one hundred twenty-one".