121021012222121 has 32 divisors (see below), whose sum is σ = 140646365798400. Its totient is φ = 102977694809280.

The previous prime is 121021012222069. The next prime is 121021012222127. The reversal of 121021012222121 is 121222210120121.

It is a cyclic number.

It is not a de Polignac number, because 121021012222121 - 2¹⁰ = 121021012221097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121021012222093 and 121021012222102.

It is not an unprimeable number, because it can be changed into a prime (121021012222127) 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, 1087160 + ... + 15595638.

It is an arithmetic number, because the mean of its divisors is an integer number (4395198931200).

Almost surely, 2^{121021012222121} is an apocalyptic number.

121021012222121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121021012222121 is a deficient number, since it is larger than the sum of its proper divisors (19625353576279).

121021012222121 is a wasteful number, since it uses less digits than its factorization.

121021012222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14508989.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121021012222121 its reverse (121222210120121), we get a palindrome (242243222342242).

The spelling of 121021012222121 in words is "one hundred twenty-one trillion, twenty-one billion, twelve million, two hundred twenty-two thousand, one hundred twenty-one".