202121010106 has 8 divisors (see below), whose sum is σ = 303706961460. Its totient is φ = 100885356288.

The previous prime is 202121010061. The next prime is 202121010127. The reversal of 202121010106 is 601010121202.

It can be written as a sum of positive squares in 2 ways, for example, as 198818783881 + 3302226225 = 445891^2 + 57465^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 202121010106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87572941 + ... + 87575248.

Almost surely, 2^202121010106 is an apocalyptic number.

202121010106 is a deficient number, since it is larger than the sum of its proper divisors (101585951354).

202121010106 is a wasteful number, since it uses less digits than its factorization.

202121010106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175148768.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 202121010106 its reverse (601010121202), we get a palindrome (803131131308).

The spelling of 202121010106 in words is "two hundred two billion, one hundred twenty-one million, ten thousand, one hundred six".