202021121222221 has 8 divisors (see below), whose sum is σ = 244462533243840. Its totient is φ = 162975022162368.

The previous prime is 202021121222209. The next prime is 202021121222231. The reversal of 202021121222221 is 122222121120202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 202021121222221 - 2¹¹ = 202021121220173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202021121222192 and 202021121222201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202021121222201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 848828240311 + ... + 848828240548.

It is an arithmetic number, because the mean of its divisors is an integer number (30557816655480).

Almost surely, 2^{202021121222221} is an apocalyptic number.

It is an amenable number.

202021121222221 is a deficient number, since it is larger than the sum of its proper divisors (42441412021619).

202021121222221 is a wasteful number, since it uses less digits than its factorization.

202021121222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1697656480883.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 202021121222221 its reverse (122222121120202), we get a palindrome (324243242342423).

The spelling of 202021121222221 in words is "two hundred two trillion, twenty-one billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty-one".