10012012021 has 12 divisors (see below), whose sum is σ = 11191471200. Its totient is φ = 8947554440.

The previous prime is 10012011983. The next prime is 10012012037. The reversal of 10012012021 is 12021021001.

It is not a de Polignac number, because 10012012021 - 2¹³ = 10012003829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10012011989 and 10012012007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10012012091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 694081 + ... + 708358.

It is an arithmetic number, because the mean of its divisors is an integer number (932622600).

Almost surely, 2^10012012021 is an apocalyptic number.

10012012021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10012012021 is a deficient number, since it is larger than the sum of its proper divisors (1179459179).

10012012021 is a wasteful number, since it uses less digits than its factorization.

10012012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402520 (or 1402509 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 10012012021 its reverse (12021021001), we get a palindrome (22033033022).

The spelling of 10012012021 in words is "ten billion, twelve million, twelve thousand, twenty-one".