20123212210 has 16 divisors (see below), whose sum is σ = 37796642496. Its totient is φ = 7699315888.

The previous prime is 20123212183. The next prime is 20123212243. The reversal of 20123212210 is 1221232102.

It is a happy number.

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, 43745884 + ... + 43746343.

It is an arithmetic number, because the mean of its divisors is an integer number (2362290156).

Almost surely, 2^20123212210 is an apocalyptic number.

20123212210 is a deficient number, since it is larger than the sum of its proper divisors (17673430286).

20123212210 is a wasteful number, since it uses less digits than its factorization.

20123212210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87492257.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20123212210 its reverse (1221232102), we get a palindrome (21344444312).

The spelling of 20123212210 in words is "twenty billion, one hundred twenty-three million, two hundred twelve thousand, two hundred ten".