2121000010 has 32 divisors (see below), whose sum is σ = 3877440192. Its totient is φ = 835246080.
The previous prime is 2120999989. The next prime is 2121000023. The reversal of 2121000010 is 100001212.
It is a junction number, because it is equal to n+sod(n) for n = 2120999957 and 2121000002.
It is an unprimeable number.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168330 + ... + 180490.
It is an arithmetic number, because the mean of its divisors is an integer number (121170006).
Almost surely, 22121000010 is an apocalyptic number.
2121000010 is a deficient number, since it is larger than the sum of its proper divisors (1756440182).
2121000010 is a wasteful number, since it uses less digits than its factorization.
2121000010 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 12438.
The product of its (nonzero) digits is 4, while the sum is 7.
The square root of 2121000010 is about 46054.3158672453. The cubic root of 2121000010 is about 1284.8336140909.
Adding to 2121000010 its reverse (100001212), we get a palindrome (2221001222).
The spelling of 2121000010 in words is "two billion, one hundred twenty-one million, ten", and thus it is an aban number.
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