121012212121 has 8 divisors (see below), whose sum is σ = 126325914624. Its totient is φ = 115702868160.

The previous prime is 121012212119. The next prime is 121012212127. The reversal of 121012212121 is 121212210121.

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

It is a cyclic number.

It is not a de Polignac number, because 121012212121 - 2¹ = 121012212119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121012212095 and 121012212104.

It is not an unprimeable number, because it can be changed into a prime (121012212127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1032825 + ... + 1144006.

It is an arithmetic number, because the mean of its divisors is an integer number (15790739328).

Almost surely, 2^121012212121 is an apocalyptic number.

It is an amenable number.

121012212121 is a deficient number, since it is larger than the sum of its proper divisors (5313702503).

121012212121 is a wasteful number, since it uses less digits than its factorization.

121012212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2179271.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121012212121 its reverse (121212210121), we get a palindrome (242224422242).

It can be divided in two parts, 12101 and 2212121, that added together give a palindrome (2224222).

The spelling of 121012212121 in words is "one hundred twenty-one billion, twelve million, two hundred twelve thousand, one hundred twenty-one".