121030002105 has 32 divisors (see below), whose sum is σ = 195563040768. Its totient is φ = 63911640000.

The previous prime is 121030002103. The next prime is 121030002131. The reversal of 121030002105 is 501200030121.

It is not a de Polignac number, because 121030002105 - 2¹ = 121030002103 is a prime.

It is a super-2 number, since 2×121030002105² (a number of 23 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 not an unprimeable number, because it can be changed into a prime (121030002101) 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, 3112030 + ... + 3150680.

It is an arithmetic number, because the mean of its divisors is an integer number (6111345024).

Almost surely, 2^121030002105 is an apocalyptic number.

121030002105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121030002105 is a deficient number, since it is larger than the sum of its proper divisors (74533038663).

121030002105 is a wasteful number, since it uses less digits than its factorization.

121030002105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40717.

The product of its (nonzero) digits is 60, while the sum is 15.

Adding to 121030002105 its reverse (501200030121), we get a palindrome (622230032226).

The spelling of 121030002105 in words is "one hundred twenty-one billion, thirty million, two thousand, one hundred five".