210120022221 has 8 divisors (see below), whose sum is σ = 280163126880. Its totient is φ = 140078466192.

The previous prime is 210120022207. The next prime is 210120022327. The reversal of 210120022221 is 122220021012.

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

It is not a de Polignac number, because 210120022221 - 2¹³ = 210120014029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210120022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210120022201) 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, 21130 + ... + 648603.

It is an arithmetic number, because the mean of its divisors is an integer number (35020390860).

Almost surely, 2^210120022221 is an apocalyptic number.

It is an amenable number.

210120022221 is a deficient number, since it is larger than the sum of its proper divisors (70043104659).

210120022221 is a wasteful number, since it uses less digits than its factorization.

210120022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774315.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 210120022221 its reverse (122220021012), we get a palindrome (332340043233).

The spelling of 210120022221 in words is "two hundred ten billion, one hundred twenty million, twenty-two thousand, two hundred twenty-one".