211220314021 has 8 divisors (see below), whose sum is σ = 211457450880. Its totient is φ = 210983300688.

The previous prime is 211220314013. The next prime is 211220314037. The reversal of 211220314021 is 120413022112.

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

It is a cyclic number.

It is not a de Polignac number, because 211220314021 - 2³ = 211220314013 is a prime.

It is a super-2 number, since 2×211220314021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211220314021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211220354021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3630600 + ... + 3688318.

It is an arithmetic number, because the mean of its divisors is an integer number (26432181360).

Almost surely, 2^211220314021 is an apocalyptic number.

It is an amenable number.

211220314021 is a deficient number, since it is larger than the sum of its proper divisors (237136859).

211220314021 is a wasteful number, since it uses less digits than its factorization.

211220314021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61763.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 211220314021 its reverse (120413022112), we get a palindrome (331633336133).

The spelling of 211220314021 in words is "two hundred eleven billion, two hundred twenty million, three hundred fourteen thousand, twenty-one".