1021000201220 has 96 divisors (see below), whose sum is σ = 2225484979200. Its totient is φ = 393247954944.

The previous prime is 1021000201213. The next prime is 1021000201223. The reversal of 1021000201220 is 221020001201.

It is a happy number.

It is a super-3 number, since 3×1021000201220³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1021000201223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13948076 + ... + 14021084.

It is an arithmetic number, because the mean of its divisors is an integer number (23182135200).

Almost surely, 2^{1021000201220} is an apocalyptic number.

1021000201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021000201220 is an abundant number, since it is smaller than the sum of its proper divisors (1204484777980).

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

1021000201220 is a wasteful number, since it uses less digits than its factorization.

1021000201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73317 (or 73315 counting only the distinct ones).

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

Adding to 1021000201220 its reverse (221020001201), we get a palindrome (1242020202421).

The spelling of 1021000201220 in words is "one trillion, twenty-one billion, two hundred one thousand, two hundred twenty".