20010121120210 has 64 divisors (see below), whose sum is σ = 39848319336672. Its totient is φ = 7186660263936.

The previous prime is 20010121120183. The next prime is 20010121120259. The reversal of 20010121120210 is 1202112101002.

It can be written as a sum of positive squares in 16 ways, for example, as 28765177609 + 19981355942601 = 169603^2 + 4470051^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16703412 + ... + 17861248.

Almost surely, 2^{20010121120210} is an apocalyptic number.

20010121120210 is a deficient number, since it is larger than the sum of its proper divisors (19838198216462).

20010121120210 is a wasteful number, since it uses less digits than its factorization.

20010121120210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161487.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20010121120210 its reverse (1202112101002), we get a palindrome (21212233221212).

The spelling of 20010121120210 in words is "twenty trillion, ten billion, one hundred twenty-one million, one hundred twenty thousand, two hundred ten".