20121010988 has 12 divisors (see below), whose sum is σ = 37920366960. Its totient is φ = 9286620432.

The previous prime is 20121010967. The next prime is 20121010997. The reversal of 20121010988 is 88901012102.

It is a super-2 number, since 2×20121010988² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193471208 + ... + 193471311.

It is an arithmetic number, because the mean of its divisors is an integer number (3160030580).

Almost surely, 2^20121010988 is an apocalyptic number.

It is an amenable number.

20121010988 is a deficient number, since it is larger than the sum of its proper divisors (17799355972).

20121010988 is a wasteful number, since it uses less digits than its factorization.

20121010988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386942536 (or 386942534 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 32.

The spelling of 20121010988 in words is "twenty billion, one hundred twenty-one million, ten thousand, nine hundred eighty-eight".