20120101021 has 8 divisors (see below), whose sum is σ = 20432844000. Its totient is φ = 19809584400.

The previous prime is 20120100953. The next prime is 20120101031. The reversal of 20120101021 is 12010102102.

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 20120101021 - 2⁷ = 20120100893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20120100989 and 20120101007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120101031) 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, 538371 + ... + 574528.

It is an arithmetic number, because the mean of its divisors is an integer number (2554105500).

Almost surely, 2^20120101021 is an apocalyptic number.

It is an amenable number.

20120101021 is a deficient number, since it is larger than the sum of its proper divisors (312742979).

20120101021 is a wasteful number, since it uses less digits than its factorization.

20120101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113179.

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

Adding to 20120101021 its reverse (12010102102), we get a palindrome (32130203123).

The spelling of 20120101021 in words is "twenty billion, one hundred twenty million, one hundred one thousand, twenty-one".