20011021010 has 8 divisors (see below), whose sum is σ = 36019837836. Its totient is φ = 8004408400.

The previous prime is 20011021001. The next prime is 20011021013. The reversal of 20011021010 is 1012011002.

It can be written as a sum of positive squares in 2 ways, for example, as 18670216321 + 1340804689 = 136639^2 + 36617^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20011021010² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20011021013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1000551041 + ... + 1000551060.

Almost surely, 2^20011021010 is an apocalyptic number.

20011021010 is a deficient number, since it is larger than the sum of its proper divisors (16008816826).

20011021010 is a wasteful number, since it uses less digits than its factorization.

20011021010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001102108.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20011021010 its reverse (1012011002), we get a palindrome (21023032012).

The spelling of 20011021010 in words is "twenty billion, eleven million, twenty-one thousand, ten".