20210111221210 has 8 divisors (see below), whose sum is σ = 36378200198196. Its totient is φ = 8084044488480.

The previous prime is 20210111221207. The next prime is 20210111221213. The reversal of 20210111221210 is 1212211101202.

It is an interprime number because it is at equal distance from previous prime (20210111221207) and next prime (20210111221213).

It can be written as a sum of positive squares in 2 ways, for example, as 20170078014321 + 40033206889 = 4491111^2 + 200083^2 .

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

It is a super-3 number, since 3×20210111221210³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20210111221213) 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, 1010505561051 + ... + 1010505561070.

Almost surely, 2^{20210111221210} is an apocalyptic number.

20210111221210 is a deficient number, since it is larger than the sum of its proper divisors (16168088976986).

20210111221210 is a wasteful number, since it uses less digits than its factorization.

20210111221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021011122128.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20210111221210 its reverse (1212211101202), we get a palindrome (21422322322412).

The spelling of 20210111221210 in words is "twenty trillion, two hundred ten billion, one hundred eleven million, two hundred twenty-one thousand, two hundred ten".