1021200102 has 32 divisors (see below), whose sum is σ = 2443899360. Its totient is φ = 314215200.

The previous prime is 1021200101. The next prime is 1021200107. The reversal of 1021200102 is 2010021201.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021200101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 726649 + ... + 728052.

It is an arithmetic number, because the mean of its divisors is an integer number (76371855).

Almost surely, 2^1021200102 is an apocalyptic number.

1021200102 is an abundant number, since it is smaller than the sum of its proper divisors (1422699258).

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

1021200102 is a wasteful number, since it uses less digits than its factorization.

1021200102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454725 (or 1454719 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1021200102 is about 31956.2216477480. The cubic root of 1021200102 is about 1007.0173423873.

Adding to 1021200102 its reverse (2010021201), we get a palindrome (3031221303).

The spelling of 1021200102 in words is "one billion, twenty-one million, two hundred thousand, one hundred two".