10121221211204 has 6 divisors (see below), whose sum is σ = 17712137119614. Its totient is φ = 5060610605600.

The previous prime is 10121221211201. The next prime is 10121221211209. The reversal of 10121221211204 is 40211212212101.

It can be written as a sum of positive squares in only one way, i.e., 10035400336900 + 85820874304 = 3167870^2 + 292952^2 .

It is a super-2 number, since 2×10121221211204² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10121221211201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1265152651397 + ... + 1265152651404.

It is an arithmetic number, because the mean of its divisors is an integer number (2952022853269).

Almost surely, 2^{10121221211204} is an apocalyptic number.

It is an amenable number.

10121221211204 is a deficient number, since it is larger than the sum of its proper divisors (7590915908410).

10121221211204 is a wasteful number, since it uses less digits than its factorization.

10121221211204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2530305302805 (or 2530305302803 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 10121221211204 its reverse (40211212212101), we get a palindrome (50332433423305).

The spelling of 10121221211204 in words is "ten trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred eleven thousand, two hundred four".