211220002202021 has 16 divisors (see below), whose sum is σ = 232605645269760. Its totient is φ = 191068922833920.

The previous prime is 211220002201979. The next prime is 211220002202047. The reversal of 211220002202021 is 120202200022112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 211220002202021 - 2¹⁰ = 211220002200997 is a prime.

It is a super-2 number, since 2×211220002202021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211220002202221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2884457996 + ... + 2884531221.

It is an arithmetic number, because the mean of its divisors is an integer number (14537852829360).

Almost surely, 2^{211220002202021} is an apocalyptic number.

It is an amenable number.

211220002202021 is a deficient number, since it is larger than the sum of its proper divisors (21385643067739).

211220002202021 is a wasteful number, since it uses less digits than its factorization.

211220002202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5768989324.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 211220002202021 its reverse (120202200022112), we get a palindrome (331422202224133).

The spelling of 211220002202021 in words is "two hundred eleven trillion, two hundred twenty billion, two million, two hundred two thousand, twenty-one".