100211000211221 has 4 divisors (see below), whose sum is σ = 100259155427244. Its totient is φ = 100162844995200.

The previous prime is 100211000211167. The next prime is 100211000211263. The reversal of 100211000211221 is 122112000112001.

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 26599919715121 + 73611080496100 = 5157511^2 + 8579690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100211000211221 is a prime.

It is a super-2 number, since 2×100211000211221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100211000211196 and 100211000211205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100211000111221) 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, 24077604890 + ... + 24077609051.

It is an arithmetic number, because the mean of its divisors is an integer number (25064788856811).

Almost surely, 2^{100211000211221} is an apocalyptic number.

It is an amenable number.

100211000211221 is a deficient number, since it is larger than the sum of its proper divisors (48155216023).

100211000211221 is an equidigital number, since it uses as much as digits as its factorization.

100211000211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48155216022.

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

Adding to 100211000211221 its reverse (122112000112001), we get a palindrome (222323000323222).

The spelling of 100211000211221 in words is "one hundred trillion, two hundred eleven billion, two hundred eleven thousand, two hundred twenty-one".