221121010102010 has 8 divisors (see below), whose sum is σ = 398017818183636. Its totient is φ = 88448404040800.

The previous prime is 221121010102001. The next prime is 221121010102039. The reversal of 221121010102010 is 10201010121122.

It can be written as a sum of positive squares in 2 ways, for example, as 219465647383129 + 1655362718881 = 14814373^2 + 1286609^2 .

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

It is a super-2 number, since 2×221121010102010² (a number of 29 digits) contains 22 as substring.

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, 11056050505091 + ... + 11056050505110.

Almost surely, 2^{221121010102010} is an apocalyptic number.

221121010102010 is a deficient number, since it is larger than the sum of its proper divisors (176896808081626).

221121010102010 is a wasteful number, since it uses less digits than its factorization.

221121010102010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22112101010208.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221121010102010 its reverse (10201010121122), we get a palindrome (231322020223132).

The spelling of 221121010102010 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, ten million, one hundred two thousand, ten".