2011021123 has 8 divisors (see below), whose sum is σ = 2208902400. Its totient is φ = 1822343688.

The previous prime is 2011021121. The next prime is 2011021141. The reversal of 2011021123 is 3211201102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2011021123 - 2¹ = 2011021121 is a prime.

It is a super-2 number, since 2×2011021123² = 8088411914304362258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011021121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2300503 + ... + 2301376.

It is an arithmetic number, because the mean of its divisors is an integer number (276112800).

Almost surely, 2^2011021123 is an apocalyptic number.

2011021123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2011021123 is a deficient number, since it is larger than the sum of its proper divisors (197881277).

2011021123 is a wasteful number, since it uses less digits than its factorization.

2011021123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4601921.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2011021123 is about 44844.4101644787. The cubic root of 2011021123 is about 1262.2311026577.

Adding to 2011021123 its reverse (3211201102), we get a palindrome (5222222225).

The spelling of 2011021123 in words is "two billion, eleven million, twenty-one thousand, one hundred twenty-three".