1021130121021 has 48 divisors (see below), whose sum is σ = 1401161361600. Its totient is φ = 661445291520.

The previous prime is 1021130121017. The next prime is 1021130121049. The reversal of 1021130121021 is 1201210311201.

It is not a de Polignac number, because 1021130121021 - 2² = 1021130121017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021130121821) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 659218155 + ... + 659219703.

It is an arithmetic number, because the mean of its divisors is an integer number (29190861700).

Almost surely, 2^{1021130121021} is an apocalyptic number.

It is an amenable number.

1021130121021 is a deficient number, since it is larger than the sum of its proper divisors (380031240579).

1021130121021 is a wasteful number, since it uses less digits than its factorization.

1021130121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2366 (or 2313 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1021130121021 its reverse (1201210311201), we get a palindrome (2222340432222).

The spelling of 1021130121021 in words is "one trillion, twenty-one billion, one hundred thirty million, one hundred twenty-one thousand, twenty-one".