12121012121 has 32 divisors (see below), whose sum is σ = 13962295296. Its totient is φ = 10454400000.

The previous prime is 12121012091. The next prime is 12121012139.

12121012121 is nontrivially palindromic in base 10.

12121012121 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12121012121 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 12121012096 and 12121012105.

It is not an unprimeable number, because it can be changed into a prime (12121011121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1219271 + ... + 1229171.

It is an arithmetic number, because the mean of its divisors is an integer number (436321728).

Almost surely, 2^12121012121 is an apocalyptic number.

It is an amenable number.

12121012121 is a deficient number, since it is larger than the sum of its proper divisors (1841283175).

12121012121 is a wasteful number, since it uses less digits than its factorization.

12121012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10073.

The product of its (nonzero) digits is 16, while the sum is 14.

It can be divided in two parts, 121210 and 12121, that added together give a palindrome (133331).

The spelling of 12121012121 in words is "twelve billion, one hundred twenty-one million, twelve thousand, one hundred twenty-one".