1021100102 has 32 divisors (see below), whose sum is σ = 1726838784. Its totient is φ = 448812000.

The previous prime is 1021100099. The next prime is 1021100141. The reversal of 1021100102 is 2010011201.

It is a self number, because there is not a number n which added to its sum of digits gives 1021100102.

It is a congruent number.

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, 90203 + ... + 100889.

It is an arithmetic number, because the mean of its divisors is an integer number (53963712).

Almost surely, 2^1021100102 is an apocalyptic number.

1021100102 is a deficient number, since it is larger than the sum of its proper divisors (705738682).

1021100102 is a wasteful number, since it uses less digits than its factorization.

1021100102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10844.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1021100102 is about 31954.6569688989. The cubic root of 1021100102 is about 1006.9844709251.

Adding to 1021100102 its reverse (2010011201), we get a palindrome (3031111303).

It can be divided in two parts, 10 and 21100102, that added together give a palindrome (21100112).

The spelling of 1021100102 in words is "one billion, twenty-one million, one hundred thousand, one hundred two".