203123201012 has 12 divisors (see below), whose sum is σ = 355468949220. Its totient is φ = 101560644096.

The previous prime is 203123201009. The next prime is 203123201051. The reversal of 203123201012 is 210102321302.

It can be written as a sum of positive squares in 2 ways, for example, as 29437637476 + 173685563536 = 171574^2 + 416756^2 .

It is a super-2 number, since 2×203123201012² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477158 + ... + 796194.

It is an arithmetic number, because the mean of its divisors is an integer number (29622412435).

Almost surely, 2^203123201012 is an apocalyptic number.

It is an amenable number.

203123201012 is a deficient number, since it is larger than the sum of its proper divisors (152345748208).

203123201012 is a wasteful number, since it uses less digits than its factorization.

203123201012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478210 (or 478208 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 203123201012 its reverse (210102321302), we get a palindrome (413225522314).

The spelling of 203123201012 in words is "two hundred three billion, one hundred twenty-three million, two hundred one thousand, twelve".