1220101012121 has 4 divisors (see below), whose sum is σ = 1220283696000. Its totient is φ = 1219918328244.

The previous prime is 1220101012069. The next prime is 1220101012159. The reversal of 1220101012121 is 1212101010221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220101012121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1220101012096 and 1220101012105.

It is not an unprimeable number, because it can be changed into a prime (1220101012171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91331921 + ... + 91345278.

It is an arithmetic number, because the mean of its divisors is an integer number (305070924000).

Almost surely, 2^{1220101012121} is an apocalyptic number.

It is an amenable number.

1220101012121 is a deficient number, since it is larger than the sum of its proper divisors (182683879).

1220101012121 is an equidigital number, since it uses as much as digits as its factorization.

1220101012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182683878.

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

Adding to 1220101012121 its reverse (1212101010221), we get a palindrome (2432202022342).

The spelling of 1220101012121 in words is "one trillion, two hundred twenty billion, one hundred one million, twelve thousand, one hundred twenty-one".