11020213431 has 16 divisors (see below), whose sum is σ = 16343520000. Its totient is φ = 7339033944.

The previous prime is 11020213423. The next prime is 11020213439. The reversal of 11020213431 is 13431202011.

11020213431 is a `hidden beast` number, since 1 + 1 + 0 + 20 + 213 + 431 = 666.

It is an interprime number because it is at equal distance from previous prime (11020213423) and next prime (11020213439).

It is not a de Polignac number, because 11020213431 - 2³ = 11020213423 is a prime.

It is a super-2 number, since 2×11020213431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020213439) 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, 189931 + ... + 241068.

It is an arithmetic number, because the mean of its divisors is an integer number (1021470000).

Almost surely, 2^11020213431 is an apocalyptic number.

11020213431 is a deficient number, since it is larger than the sum of its proper divisors (5323306569).

11020213431 is an equidigital number, since it uses as much as digits as its factorization.

11020213431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431955 (or 431949 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 11020213431 its reverse (13431202011), we get a palindrome (24451415442).

The spelling of 11020213431 in words is "eleven billion, twenty million, two hundred thirteen thousand, four hundred thirty-one".