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120101021 = 4353151349
BaseRepresentation
bin1110010100010…
…01100010011101
322100222202121222
413022021202131
5221221213041
615530103125
72655561515
oct712114235
9270882558
10120101021
1161880747
123427aaa5
131bb60bc1
1411d44845
15a82574b
hex728989d

120101021 has 16 divisors (see below), whose sum is σ = 126403200. Its totient is φ = 114004800.

The previous prime is 120101011. The next prime is 120101053.

120101021 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 120101021 - 214 = 120084637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120101011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 343955 + ... + 344303.

It is an arithmetic number, because the mean of its divisors is an integer number (7900200).

Almost surely, 2120101021 is an apocalyptic number.

It is an amenable number.

120101021 is a deficient number, since it is larger than the sum of its proper divisors (6302179).

120101021 is a wasteful number, since it uses less digits than its factorization.

120101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 120101021 is about 10959.0611367945. The cubic root of 120101021 is about 493.3807867165.

It can be divided in two parts, 12010 and 1021, that added together give a palindrome (13031).

The spelling of 120101021 in words is "one hundred twenty million, one hundred one thousand, twenty-one".

Divisors: 1 43 53 151 349 2279 6493 8003 15007 18497 52699 344129 795371 2266057 2793047 120101021