121022212121 has 8 divisors (see below), whose sum is σ = 121235677920. Its totient is φ = 120808805472.

The previous prime is 121022212097. The next prime is 121022212127. The reversal of 121022212121 is 121212220121.

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 121022212121 - 2¹⁸ = 121021949977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121022212121.

It is not an unprimeable number, because it can be changed into a prime (121022212127) 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, 6628421 + ... + 6646653.

It is an arithmetic number, because the mean of its divisors is an integer number (15154459740).

Almost surely, 2^121022212121 is an apocalyptic number.

It is an amenable number.

121022212121 is a deficient number, since it is larger than the sum of its proper divisors (213465799).

121022212121 is a wasteful number, since it uses less digits than its factorization.

121022212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29575.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121022212121 its reverse (121212220121), we get a palindrome (242234432242).

The spelling of 121022212121 in words is "one hundred twenty-one billion, twenty-two million, two hundred twelve thousand, one hundred twenty-one".