201121211221210 has 32 divisors (see below), whose sum is σ = 414191220946560. Its totient is φ = 68879817536832.

The previous prime is 201121211221181. The next prime is 201121211221253. The reversal of 201121211221210 is 12122112121102.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1583817525 + ... + 1583944504.

It is an arithmetic number, because the mean of its divisors is an integer number (12943475654580).

Almost surely, 2^{201121211221210} is an apocalyptic number.

201121211221210 is an abundant number, since it is smaller than the sum of its proper divisors (213070009725350).

201121211221210 is a wasteful number, since it uses less digits than its factorization.

201121211221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3167762950.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 201121211221210 its reverse (12122112121102), we get a palindrome (213243323342312).

The spelling of 201121211221210 in words is "two hundred one trillion, one hundred twenty-one billion, two hundred eleven million, two hundred twenty-one thousand, two hundred ten".