1021020206 has 4 divisors (see below), whose sum is σ = 1531530312. Its totient is φ = 510510102.

The previous prime is 1021020199. The next prime is 1021020227. The reversal of 1021020206 is 6020201201.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1021020206² = 2084964522120564872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255255050 + ... + 255255053.

It is an arithmetic number, because the mean of its divisors is an integer number (382882578).

Almost surely, 2^1021020206 is an apocalyptic number.

1021020206 is a deficient number, since it is larger than the sum of its proper divisors (510510106).

1021020206 is an equidigital number, since it uses as much as digits as its factorization.

1021020206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510510105.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1021020206 is about 31953.4067980239. The cubic root of 1021020206 is about 1006.9582063994.

Adding to 1021020206 its reverse (6020201201), we get a palindrome (7041221407).

The spelling of 1021020206 in words is "one billion, twenty-one million, twenty thousand, two hundred six".