1210002120105 has 24 divisors (see below), whose sum is σ = 2000469710016. Its totient is φ = 624517215840.

The previous prime is 1210002120079. The next prime is 1210002120139. The reversal of 1210002120105 is 5010212000121.

It is not a de Polignac number, because 1210002120105 - 2⁸ = 1210002119849 is a prime.

It is a super-2 number, since 2×1210002120105² (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 polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41955829 + ... + 41984658.

It is an arithmetic number, because the mean of its divisors is an integer number (83352904584).

Almost surely, 2^{1210002120105} is an apocalyptic number.

1210002120105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1210002120105 is a deficient number, since it is larger than the sum of its proper divisors (790467589911).

1210002120105 is an equidigital number, since it uses as much as digits as its factorization.

1210002120105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83940557 (or 83940526 counting only the distinct ones).

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

Adding to 1210002120105 its reverse (5010212000121), we get a palindrome (6220214120226).

The spelling of 1210002120105 in words is "one trillion, two hundred ten billion, two million, one hundred twenty thousand, one hundred five".