1021012021121 has 32 divisors (see below), whose sum is σ = 1059332083200. Its totient is φ = 983557935360.

The previous prime is 1021012021111. The next prime is 1021012021129. The reversal of 1021012021121 is 1211202101201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021012021121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021012021096 and 1021012021105.

It is not an unprimeable number, because it can be changed into a prime (1021012021129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 699801890 + ... + 699803348.

It is an arithmetic number, because the mean of its divisors is an integer number (33104127600).

Almost surely, 2^{1021012021121} is an apocalyptic number.

It is an amenable number.

1021012021121 is a deficient number, since it is larger than the sum of its proper divisors (38320062079).

1021012021121 is a wasteful number, since it uses less digits than its factorization.

1021012021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2409.

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

Adding to 1021012021121 its reverse (1211202101201), we get a palindrome (2232214122322).

The spelling of 1021012021121 in words is "one trillion, twenty-one billion, twelve million, twenty-one thousand, one hundred twenty-one".