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121140251 = 887136573
BaseRepresentation
bin1110011100001…
…11010000011011
322102221120011222
413032013100123
5222002442001
620004242255
73000450401
oct716072033
9272846158
10121140251
1162420511
12346a038b
131c135c2b
1412135471
15a97d61b
hex738741b

121140251 has 4 divisors (see below), whose sum is σ = 121277712. Its totient is φ = 121002792.

The previous prime is 121140247. The next prime is 121140263. The reversal of 121140251 is 152041121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121140251 - 22 = 121140247 is a prime.

It is a super-3 number, since 3×1211402513 (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121140211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67400 + ... + 69173.

It is an arithmetic number, because the mean of its divisors is an integer number (30319428).

Almost surely, 2121140251 is an apocalyptic number.

121140251 is a deficient number, since it is larger than the sum of its proper divisors (137461).

121140251 is an equidigital number, since it uses as much as digits as its factorization.

121140251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137460.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 121140251 is about 11006.3731991969. The cubic root of 121140251 is about 494.7997707333.

Adding to 121140251 its reverse (152041121), we get a palindrome (273181372).

The spelling of 121140251 in words is "one hundred twenty-one million, one hundred forty thousand, two hundred fifty-one".

Divisors: 1 887 136573 121140251