211020211220021 has 8 divisors (see below), whose sum is σ = 241383418227840. Its totient is φ = 180711369849168.

The previous prime is 211020211220011. The next prime is 211020211220029. The reversal of 211020211220021 is 120022112020112.

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 211020211220021 - 2²² = 211020207025717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211020211220029) 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, 13591400921 + ... + 13591416446.

It is an arithmetic number, because the mean of its divisors is an integer number (30172927278480).

Almost surely, 2^{211020211220021} is an apocalyptic number.

It is an amenable number.

211020211220021 is a deficient number, since it is larger than the sum of its proper divisors (30363207007819).

211020211220021 is a wasteful number, since it uses less digits than its factorization.

211020211220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27182818483.

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

Adding to 211020211220021 its reverse (120022112020112), we get a palindrome (331042323240133).

The spelling of 211020211220021 in words is "two hundred eleven trillion, twenty billion, two hundred eleven million, two hundred twenty thousand, twenty-one".