121010220012121 has 16 divisors (see below), whose sum is σ = 132093163368000. Its totient is φ = 109940963040000.

The previous prime is 121010220012079. The next prime is 121010220012169. The reversal of 121010220012121 is 121210022010121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121010220012121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121010220012095 and 121010220012104.

It is not an unprimeable number, because it can be changed into a prime (121010220022121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140435805 + ... + 141294853.

It is an arithmetic number, because the mean of its divisors is an integer number (8255822710500).

Almost surely, 2^{121010220012121} is an apocalyptic number.

121010220012121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121010220012121 is a deficient number, since it is larger than the sum of its proper divisors (11082943355879).

121010220012121 is a wasteful number, since it uses less digits than its factorization.

121010220012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867000.

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

Adding to 121010220012121 its reverse (121210022010121), we get a palindrome (242220242022242).

The spelling of 121010220012121 in words is "one hundred twenty-one trillion, ten billion, two hundred twenty million, twelve thousand, one hundred twenty-one".