201121212122 has 16 divisors (see below), whose sum is σ = 311812647552. Its totient is φ = 97235219520.

The previous prime is 201121212073. The next prime is 201121212133. The reversal of 201121212122 is 221212121102.

It is a self number, because there is not a number n which added to its sum of digits gives 201121212122.

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, 12881279 + ... + 12896882.

It is an arithmetic number, because the mean of its divisors is an integer number (19488290472).

Almost surely, 2^201121212122 is an apocalyptic number.

201121212122 is a deficient number, since it is larger than the sum of its proper divisors (110691435430).

201121212122 is a wasteful number, since it uses less digits than its factorization.

201121212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25778293.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201121212122 its reverse (221212121102), we get a palindrome (422333333224).

The spelling of 201121212122 in words is "two hundred one billion, one hundred twenty-one million, two hundred twelve thousand, one hundred twenty-two".