20010021113 has 8 divisors (see below), whose sum is σ = 20387805960. Its totient is φ = 19633841280.

The previous prime is 20010021103. The next prime is 20010021131. The reversal of 20010021113 is 31112001002.

It can be written as a sum of positive squares in 4 ways, for example, as 83028544 + 19926992569 = 9112^2 + 141163^2 .

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 20010021113 - 2⁶ = 20010021049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20010021094 and 20010021103.

It is not an unprimeable number, because it can be changed into a prime (20010021103) 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, 376070 + ... + 425967.

It is an arithmetic number, because the mean of its divisors is an integer number (2548475745).

Almost surely, 2^20010021113 is an apocalyptic number.

It is an amenable number.

20010021113 is a deficient number, since it is larger than the sum of its proper divisors (377784847).

20010021113 is an equidigital number, since it uses as much as digits as its factorization.

20010021113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802507.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20010021113 its reverse (31112001002), we get a palindrome (51122022115).

The spelling of 20010021113 in words is "twenty billion, ten million, twenty-one thousand, one hundred thirteen".