202202012221121 has 4 divisors (see below), whose sum is σ = 220584013332144. Its totient is φ = 183820011110100.

The previous prime is 202202012221091. The next prime is 202202012221129. The reversal of 202202012221121 is 121122210202202.

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 202202012221121 - 2¹⁴ = 202202012204737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202202012221093 and 202202012221102.

It is not an unprimeable number, because it can be changed into a prime (202202012221129) 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, 9191000555495 + ... + 9191000555516.

It is an arithmetic number, because the mean of its divisors is an integer number (55146003333036).

Almost surely, 2^{202202012221121} is an apocalyptic number.

It is an amenable number.

202202012221121 is a deficient number, since it is larger than the sum of its proper divisors (18382001111023).

202202012221121 is a wasteful number, since it uses less digits than its factorization.

202202012221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18382001111022.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 202202012221121 its reverse (121122210202202), we get a palindrome (323324222423323).

The spelling of 202202012221121 in words is "two hundred two trillion, two hundred two billion, twelve million, two hundred twenty-one thousand, one hundred twenty-one".