20102012021 has 8 divisors (see below), whose sum is σ = 24740937984. Its totient is φ = 15904888560.

The previous prime is 20102012017. The next prime is 20102012039. The reversal of 20102012021 is 12021020102.

It is a happy number.

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 20102012021 - 2² = 20102012017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20102011993 and 20102012011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102012081) 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, 110450525 + ... + 110450706.

It is an arithmetic number, because the mean of its divisors is an integer number (3092617248).

Almost surely, 2^20102012021 is an apocalyptic number.

It is an amenable number.

20102012021 is a deficient number, since it is larger than the sum of its proper divisors (4638925963).

20102012021 is a wasteful number, since it uses less digits than its factorization.

20102012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220901251.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20102012021 its reverse (12021020102), we get a palindrome (32123032123).

The spelling of 20102012021 in words is "twenty billion, one hundred two million, twelve thousand, twenty-one".