12021881890 has 32 divisors (see below), whose sum is σ = 22121579520. Its totient is φ = 4702454400.

The previous prime is 12021881803. The next prime is 12021881903. The reversal of 12021881890 is 9818812021.

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, 59350 + ... + 166030.

It is an arithmetic number, because the mean of its divisors is an integer number (691299360).

Almost surely, 2^12021881890 is an apocalyptic number.

12021881890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12021881890 is a deficient number, since it is larger than the sum of its proper divisors (10099697630).

12021881890 is a wasteful number, since it uses less digits than its factorization.

12021881890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106938.

The product of its (nonzero) digits is 18432, while the sum is 40.

The spelling of 12021881890 in words is "twelve billion, twenty-one million, eight hundred eighty-one thousand, eight hundred ninety".