1021120020105 has 32 divisors (see below), whose sum is σ = 1670106547200. Its totient is φ = 532609463232.

The previous prime is 1021120020091. The next prime is 1021120020119. The reversal of 1021120020105 is 5010200211201.

It is an interprime number because it is at equal distance from previous prime (1021120020091) and next prime (1021120020119).

It is not a de Polignac number, because 1021120020105 - 2¹⁵ = 1021119987337 is a prime.

It is a super-2 number, since 2×1021120020105² (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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3515125 + ... + 3794514.

It is an arithmetic number, because the mean of its divisors is an integer number (52190829600).

Almost surely, 2^{1021120020105} is an apocalyptic number.

1021120020105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1021120020105 is a deficient number, since it is larger than the sum of its proper divisors (648986527095).

1021120020105 is a wasteful number, since it uses less digits than its factorization.

1021120020105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7309853.

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

Adding to 1021120020105 its reverse (5010200211201), we get a palindrome (6031320231306).

The spelling of 1021120020105 in words is "one trillion, twenty-one billion, one hundred twenty million, twenty thousand, one hundred five".