210221002111020 has 48 divisors (see below), whose sum is σ = 593827821911520. Its totient is φ = 55562837134336.

The previous prime is 210221002111009. The next prime is 210221002111049. The reversal of 210221002111020 is 20111200122012.

It is a super-2 number, since 2×210221002111020² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15503016975 + ... + 15503030534.

It is an arithmetic number, because the mean of its divisors is an integer number (12371412956490).

Almost surely, 2^{210221002111020} is an apocalyptic number.

210221002111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210221002111020 is an abundant number, since it is smaller than the sum of its proper divisors (383606819800500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210221002111020 is a wasteful number, since it uses less digits than its factorization.

210221002111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31006047634 (or 31006047632 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210221002111020 its reverse (20111200122012), we get a palindrome (230332202233032).

The spelling of 210221002111020 in words is "two hundred ten trillion, two hundred twenty-one billion, two million, one hundred eleven thousand, twenty".