121012211010203 has 4 divisors (see below), whose sum is σ = 121013213792328. Its totient is φ = 121011208228080.

The previous prime is 121012211010193. The next prime is 121012211010227. The reversal of 121012211010203 is 302010112210121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121012211010203 - 2⁸ = 121012211009947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121012211010703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501210026 + ... + 501451407.

It is an arithmetic number, because the mean of its divisors is an integer number (30253303448082).

Almost surely, 2^{121012211010203} is an apocalyptic number.

121012211010203 is a deficient number, since it is larger than the sum of its proper divisors (1002782125).

121012211010203 is a wasteful number, since it uses less digits than its factorization.

121012211010203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002782124.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 121012211010203 its reverse (302010112210121), we get a palindrome (423022323220324).

The spelling of 121012211010203 in words is "one hundred twenty-one trillion, twelve billion, two hundred eleven million, ten thousand, two hundred three".