120001010121 has 6 divisors (see below), whose sum is σ = 173334792410. Its totient is φ = 80000673408.

The previous prime is 120001010119. The next prime is 120001010123. The reversal of 120001010121 is 121010100021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (120001010119) and next prime (120001010123).

It can be written as a sum of positive squares in only one way, i.e., 119570032521 + 430977600 = 345789^2 + 20760^2 .

It is not a de Polignac number, because 120001010121 - 2¹ = 120001010119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 13333445569 = 120001010121 / (1 + 2 + 0 + 0 + 0 + 1 + 0 + 1 + 0 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120001010123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6666722776 + ... + 6666722793.

Almost surely, 2^120001010121 is an apocalyptic number.

It is an amenable number.

120001010121 is a deficient number, since it is larger than the sum of its proper divisors (53333782289).

120001010121 is a wasteful number, since it uses less digits than its factorization.

120001010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13333445575 (or 13333445572 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 120001010121 its reverse (121010100021), we get a palindrome (241011110142).

It can be divided in two parts, 12000 and 1010121, that added together give a square (1022121 = 1011²).

The spelling of 120001010121 in words is "one hundred twenty billion, one million, ten thousand, one hundred twenty-one".