211221210220010 has 8 divisors (see below), whose sum is σ = 380198178396036. Its totient is φ = 84488484088000.

The previous prime is 211221210219997. The next prime is 211221210220021. The reversal of 211221210220010 is 10022012122112.

It can be written as a sum of positive squares in 2 ways, for example, as 185938123343569 + 25283086876441 = 13635913^2 + 5028229^2 .

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

It is a super-2 number, since 2×211221210220010² (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, 10561060510991 + ... + 10561060511010.

Almost surely, 2^{211221210220010} is an apocalyptic number.

211221210220010 is a deficient number, since it is larger than the sum of its proper divisors (168976968176026).

211221210220010 is a wasteful number, since it uses less digits than its factorization.

211221210220010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21122121022008.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211221210220010 its reverse (10022012122112), we get a palindrome (221243222342122).

The spelling of 211221210220010 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred ten million, two hundred twenty thousand, ten".