1020020311 has 8 divisors (see below), whose sum is σ = 1063352448. Its totient is φ = 977340000.

The previous prime is 1020020303. The next prime is 1020020333. The reversal of 1020020311 is 1130200201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1020020311 - 2³ = 1020020303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020020381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159760 + ... + 166021.

It is an arithmetic number, because the mean of its divisors is an integer number (132919056).

Almost surely, 2^1020020311 is an apocalyptic number.

1020020311 is a deficient number, since it is larger than the sum of its proper divisors (43332137).

1020020311 is a wasteful number, since it uses less digits than its factorization.

1020020311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325913.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1020020311 is about 31937.7568247991. The cubic root of 1020020311 is about 1006.6293910562.

Adding to 1020020311 its reverse (1130200201), we get a palindrome (2150220512).

The spelling of 1020020311 in words is "one billion, twenty million, twenty thousand, three hundred eleven".