1020121015005 has 160 divisors (see below), whose sum is σ = 1914892024320. Its totient is φ = 519114718080.

The previous prime is 1020121014977. The next prime is 1020121015049. The reversal of 1020121015005 is 5005101210201.

It is not a de Polignac number, because 1020121015005 - 2⁸ = 1020121014749 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 167477010 + ... + 167483100.

It is an arithmetic number, because the mean of its divisors is an integer number (11968075152).

Almost surely, 2^{1020121015005} is an apocalyptic number.

1020121015005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1020121015005 is a deficient number, since it is larger than the sum of its proper divisors (894771009315).

1020121015005 is a wasteful number, since it uses less digits than its factorization.

1020121015005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6373 (or 6364 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

Adding to 1020121015005 its reverse (5005101210201), we get a palindrome (6025222225206).

The spelling of 1020121015005 in words is "one trillion, twenty billion, one hundred twenty-one million, fifteen thousand, five".