121020011002021 has 16 divisors (see below), whose sum is σ = 122101137252864. Its totient is φ = 119943192973824.

The previous prime is 121020011002019. The next prime is 121020011002049. The reversal of 121020011002021 is 120200110020121.

It is a cyclic number.

It is not a de Polignac number, because 121020011002021 - 2¹ = 121020011002019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121020011001992 and 121020011002010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121020011002061) 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, 659982676 + ... + 660166018.

It is an arithmetic number, because the mean of its divisors is an integer number (7631321078304).

Almost surely, 2^{121020011002021} is an apocalyptic number.

It is an amenable number.

121020011002021 is a deficient number, since it is larger than the sum of its proper divisors (1081126250843).

121020011002021 is a wasteful number, since it uses less digits than its factorization.

121020011002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195060.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121020011002021 its reverse (120200110020121), we get a palindrome (241220121022142).

The spelling of 121020011002021 in words is "one hundred twenty-one trillion, twenty billion, eleven million, two thousand, twenty-one".