20211121210 has 16 divisors (see below), whose sum is σ = 41577163776. Its totient is φ = 6929527248.

The previous prime is 20211121207. The next prime is 20211121289. The reversal of 20211121210 is 1212111202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144365082 + ... + 144365221.

It is an arithmetic number, because the mean of its divisors is an integer number (2598572736).

Almost surely, 2^20211121210 is an apocalyptic number.

20211121210 is an abundant number, since it is smaller than the sum of its proper divisors (21366042566).

20211121210 is a wasteful number, since it uses less digits than its factorization.

20211121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288730317.

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

Adding to 20211121210 its reverse (1212111202), we get a palindrome (21423232412).

The spelling of 20211121210 in words is "twenty billion, two hundred eleven million, one hundred twenty-one thousand, two hundred ten".