1020121120005 has 48 divisors (see below), whose sum is σ = 1828350247680. Its totient is φ = 484895733504.

The previous prime is 1020121119991. The next prime is 1020121120013. The reversal of 1020121120005 is 5000211210201.

It is not a de Polignac number, because 1020121120005 - 2¹³ = 1020121111813 is a prime.

It is a super-2 number, since 2×1020121120005² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6864669 + ... + 7011698.

It is an arithmetic number, because the mean of its divisors is an integer number (38090630160).

Almost surely, 2^{1020121120005} is an apocalyptic number.

1020121120005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1020121120005 is a deficient number, since it is larger than the sum of its proper divisors (808229127675).

1020121120005 is a wasteful number, since it uses less digits than its factorization.

1020121120005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13876430 (or 13876417 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 1020121120005 its reverse (5000211210201), we get a palindrome (6020332330206).

The spelling of 1020121120005 in words is "one trillion, twenty billion, one hundred twenty-one million, one hundred twenty thousand, five".