210220210202021 has 48 divisors (see below), whose sum is σ = 221332087105920. Its totient is φ = 199619052134400.

The previous prime is 210220210202017. The next prime is 210220210202029. The reversal of 210220210202021 is 120202012022012.

It is a happy number.

It is not a de Polignac number, because 210220210202021 - 2² = 210220210202017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210220210202029) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12725956400 + ... + 12725972918.

It is an arithmetic number, because the mean of its divisors is an integer number (4611085148040).

Almost surely, 2^{210220210202021} is an apocalyptic number.

It is an amenable number.

210220210202021 is a deficient number, since it is larger than the sum of its proper divisors (11111876903899).

210220210202021 is a wasteful number, since it uses less digits than its factorization.

210220210202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17578 (or 17547 counting only the distinct ones).

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

Adding to 210220210202021 its reverse (120202012022012), we get a palindrome (330422222224033).

The spelling of 210220210202021 in words is "two hundred ten trillion, two hundred twenty billion, two hundred ten million, two hundred two thousand, twenty-one".