202202110001021 has 4 divisors (see below), whose sum is σ = 217756118462652. Its totient is φ = 186648101539392.

The previous prime is 202202110001009. The next prime is 202202110001053. The reversal of 202202110001021 is 120100011202202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24789992892025 + 177412117108996 = 4978955^2 + 13319614^2 .

It is a cyclic number.

It is not a de Polignac number, because 202202110001021 - 2¹⁰ = 202202109999997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202202110000987 and 202202110001005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202202170001021) 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, 7777004230796 + ... + 7777004230821.

It is an arithmetic number, because the mean of its divisors is an integer number (54439029615663).

Almost surely, 2^{202202110001021} is an apocalyptic number.

It is an amenable number.

202202110001021 is a deficient number, since it is larger than the sum of its proper divisors (15554008461631).

202202110001021 is a wasteful number, since it uses less digits than its factorization.

202202110001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15554008461630.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 202202110001021 its reverse (120100011202202), we get a palindrome (322302121203223).

The spelling of 202202110001021 in words is "two hundred two trillion, two hundred two billion, one hundred ten million, one thousand, twenty-one".