1231203022201 has 4 divisors (see below), whose sum is σ = 1257398831232. Its totient is φ = 1205007213172.

The previous prime is 1231203022199. The next prime is 1231203022211. The reversal of 1231203022201 is 1022203021321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1231203022201 - 2¹ = 1231203022199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231203022211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13097904445 + ... + 13097904538.

It is an arithmetic number, because the mean of its divisors is an integer number (314349707808).

Almost surely, 2^{1231203022201} is an apocalyptic number.

It is an amenable number.

1231203022201 is a deficient number, since it is larger than the sum of its proper divisors (26195809031).

1231203022201 is an equidigital number, since it uses as much as digits as its factorization.

1231203022201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26195809030.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 1231203022201 its reverse (1022203021321), we get a palindrome (2253406043522).

The spelling of 1231203022201 in words is "one trillion, two hundred thirty-one billion, two hundred three million, twenty-two thousand, two hundred one".