203121121022 has 4 divisors (see below), whose sum is σ = 304681681536. Its totient is φ = 101560560510.

The previous prime is 203121121009. The next prime is 203121121087. The reversal of 203121121022 is 220121121302.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 50780280254 + ... + 50780280257.

It is an arithmetic number, because the mean of its divisors is an integer number (76170420384).

Almost surely, 2^203121121022 is an apocalyptic number.

203121121022 is a deficient number, since it is larger than the sum of its proper divisors (101560560514).

203121121022 is a wasteful number, since it uses less digits than its factorization.

203121121022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101560560513.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 203121121022 its reverse (220121121302), we get a palindrome (423242242324).

The spelling of 203121121022 in words is "two hundred three billion, one hundred twenty-one million, one hundred twenty-one thousand, twenty-two".