1020121202021 has 16 divisors (see below), whose sum is σ = 1033057834368. Its totient is φ = 1007244072000.

The previous prime is 1020121201991. The next prime is 1020121202047. The reversal of 1020121202021 is 1202021210201.

It is a cyclic number.

It is not a de Polignac number, because 1020121202021 - 2³⁸ = 745243295077 is a prime.

It is a super-3 number, since 3×1020121202021³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020121201987 and 1020121202005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020121202071) 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, 56946056 + ... + 56963966.

It is an arithmetic number, because the mean of its divisors is an integer number (64566114648).

Almost surely, 2^{1020121202021} is an apocalyptic number.

It is an amenable number.

1020121202021 is a deficient number, since it is larger than the sum of its proper divisors (12936632347).

1020121202021 is a wasteful number, since it uses less digits than its factorization.

1020121202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19532.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1020121202021 its reverse (1202021210201), we get a palindrome (2222142412222).

The spelling of 1020121202021 in words is "one trillion, twenty billion, one hundred twenty-one million, two hundred two thousand, twenty-one".