1020421311 has 32 divisors (see below), whose sum is σ = 1773047808. Its totient is φ = 506580480.

The previous prime is 1020421291. The next prime is 1020421319. The reversal of 1020421311 is 1131240201.

It is not a de Polignac number, because 1020421311 - 2⁶ = 1020421247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020421319) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105295 + ... + 114576.

It is an arithmetic number, because the mean of its divisors is an integer number (55407744).

Almost surely, 2^1020421311 is an apocalyptic number.

1020421311 is a deficient number, since it is larger than the sum of its proper divisors (752626497).

1020421311 is a wasteful number, since it uses less digits than its factorization.

1020421311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219911.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1020421311 is about 31944.0340439338. The cubic root of 1020421311 is about 1006.7612856523.

Adding to 1020421311 its reverse (1131240201), we get a palindrome (2151661512).

The spelling of 1020421311 in words is "one billion, twenty million, four hundred twenty-one thousand, three hundred eleven".