20010121010 has 32 divisors (see below), whose sum is σ = 39681658944. Its totient is φ = 7204360000.

The previous prime is 20010121007. The next prime is 20010121013. The reversal of 20010121010 is 1012101002.

It is an interprime number because it is at equal distance from previous prime (20010121007) and next prime (20010121013).

It is not an unprimeable number, because it can be changed into a prime (20010121013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 889436 + ... + 911655.

It is an arithmetic number, because the mean of its divisors is an integer number (1240051842).

Almost surely, 2^20010121010 is an apocalyptic number.

20010121010 is a deficient number, since it is larger than the sum of its proper divisors (19671537934).

20010121010 is a wasteful number, since it uses less digits than its factorization.

20010121010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801210.

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

Adding to 20010121010 its reverse (1012101002), we get a palindrome (21022222012).

The spelling of 20010121010 in words is "twenty billion, ten million, one hundred twenty-one thousand, ten".