121020021021121 has 8 divisors (see below), whose sum is σ = 121055422924800. Its totient is φ = 120984623370432.

The previous prime is 121020021021079. The next prime is 121020021021139. The reversal of 121020021021121 is 121120120020121.

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 121020021021121 - 2¹⁷ = 121020020890049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121020021021095 and 121020021021104.

It is not an unprimeable number, because it can be changed into a prime (121020021021421) 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, 56307576 + ... + 58417318.

It is an arithmetic number, because the mean of its divisors is an integer number (15131927865600).

Almost surely, 2^{121020021021121} is an apocalyptic number.

It is an amenable number.

121020021021121 is a deficient number, since it is larger than the sum of its proper divisors (35401903679).

121020021021121 is a wasteful number, since it uses less digits than its factorization.

121020021021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126495.

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

Adding to 121020021021121 its reverse (121120120020121), we get a palindrome (242140141041242).

The spelling of 121020021021121 in words is "one hundred twenty-one trillion, twenty billion, twenty-one million, twenty-one thousand, one hundred twenty-one".