210220001021 has 8 divisors (see below), whose sum is σ = 222596890560. Its totient is φ = 197844334528.

The previous prime is 210220000843. The next prime is 210220001041. The reversal of 210220001021 is 120100022012.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210220001021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210220000993 and 210220001011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210220001041) 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, 60680 + ... + 651246.

It is an arithmetic number, because the mean of its divisors is an integer number (27824611320).

Almost surely, 2^210220001021 is an apocalyptic number.

It is an amenable number.

210220001021 is a deficient number, since it is larger than the sum of its proper divisors (12376889539).

210220001021 is a wasteful number, since it uses less digits than its factorization.

210220001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611523.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 210220001021 its reverse (120100022012), we get a palindrome (330320023033).

The spelling of 210220001021 in words is "two hundred ten billion, two hundred twenty million, one thousand, twenty-one".