1021020102 has 48 divisors (see below), whose sum is σ = 2377348272. Its totient is φ = 315532800.

The previous prime is 1021020097. The next prime is 1021020107. The reversal of 1021020102 is 2010201201.

It is an interprime number because it is at equal distance from previous prime (1021020097) and next prime (1021020107).

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 (1021020107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4399 + ... + 45402.

It is an arithmetic number, because the mean of its divisors is an integer number (49528089).

Almost surely, 2^1021020102 is an apocalyptic number.

1021020102 is an abundant number, since it is smaller than the sum of its proper divisors (1356328170).

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

1021020102 is a wasteful number, since it uses less digits than its factorization.

1021020102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49893 (or 49890 counting only the distinct ones).

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

The square root of 1021020102 is about 31953.4051706543. The cubic root of 1021020102 is about 1006.9581722102.

Adding to 1021020102 its reverse (2010201201), we get a palindrome (3031221303).

The spelling of 1021020102 in words is "one billion, twenty-one million, twenty thousand, one hundred two".