10121220203 has 4 divisors (see below), whose sum is σ = 10181826480. Its totient is φ = 10060613928.

The previous prime is 10121220149. The next prime is 10121220233. The reversal of 10121220203 is 30202212101.

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 10121220203 - 2¹⁰ = 10121219179 is a prime.

It is a super-2 number, since 2×10121220203² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10121220233) 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, 30302888 + ... + 30303221.

It is an arithmetic number, because the mean of its divisors is an integer number (2545456620).

Almost surely, 2^10121220203 is an apocalyptic number.

10121220203 is a deficient number, since it is larger than the sum of its proper divisors (60606277).

10121220203 is an equidigital number, since it uses as much as digits as its factorization.

10121220203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60606276.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 10121220203 its reverse (30202212101), we get a palindrome (40323432304).

The spelling of 10121220203 in words is "ten billion, one hundred twenty-one million, two hundred twenty thousand, two hundred three".