202012110222221 has 12 divisors (see below), whose sum is σ = 226289835777780. Its totient is φ = 180042623429760.

The previous prime is 202012110222191. The next prime is 202012110222343. The reversal of 202012110222221 is 122222011210202.

It can be written as a sum of positive squares in 6 ways, for example, as 93370283608900 + 108641826613321 = 9662830^2 + 10423139^2 .

It is not a de Polignac number, because 202012110222221 - 2²² = 202012106027917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202012110222193 and 202012110222202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202012110722221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20609269760 + ... + 20609279561.

It is an arithmetic number, because the mean of its divisors is an integer number (18857486314815).

Almost surely, 2^{202012110222221} is an apocalyptic number.

It is an amenable number.

202012110222221 is a deficient number, since it is larger than the sum of its proper divisors (24277725555559).

202012110222221 is a wasteful number, since it uses less digits than its factorization.

202012110222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41218549376 (or 41218549363 counting only the distinct ones).

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

Adding to 202012110222221 its reverse (122222011210202), we get a palindrome (324234121432423).

The spelling of 202012110222221 in words is "two hundred two trillion, twelve billion, one hundred ten million, two hundred twenty-two thousand, two hundred twenty-one".