1020211100100 has 72 divisors (see below), whose sum is σ = 3279789767520. Its totient is φ = 272056292640.

The previous prime is 1020211100089. The next prime is 1020211100131. The reversal of 1020211100100 is 10011120201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 188925282 + ... + 188930681.

It is an arithmetic number, because the mean of its divisors is an integer number (45552635660).

Almost surely, 2^{1020211100100} is an apocalyptic number.

1020211100100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020211100100 is an abundant number, since it is smaller than the sum of its proper divisors (2259578667420).

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

1020211100100 is a wasteful number, since it uses less digits than its factorization.

1020211100100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377855986 (or 377855973 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1020211100100 its reverse (10011120201), we get a palindrome (1030222220301).

The spelling of 1020211100100 in words is "one trillion, twenty billion, two hundred eleven million, one hundred thousand, one hundred".