201121220121022 has 4 divisors (see below), whose sum is σ = 301681830181536. Its totient is φ = 100560610060510.

The previous prime is 201121220120923. The next prime is 201121220121103. The reversal of 201121220121022 is 220121022121102.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50280305030254 + ... + 50280305030257.

It is an arithmetic number, because the mean of its divisors is an integer number (75420457545384).

Almost surely, 2^{201121220121022} is an apocalyptic number.

201121220121022 is a deficient number, since it is larger than the sum of its proper divisors (100560610060514).

201121220121022 is a wasteful number, since it uses less digits than its factorization.

201121220121022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100560610060513.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 201121220121022 its reverse (220121022121102), we get a palindrome (421242242242124).

The spelling of 201121220121022 in words is "two hundred one trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twenty-one thousand, twenty-two".