11521421350 has 12 divisors (see below), whose sum is σ = 21429843804. Its totient is φ = 4608568520.

The previous prime is 11521421347. The next prime is 11521421369. The reversal of 11521421350 is 5312412511.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 115214164 + ... + 115214263.

It is an arithmetic number, because the mean of its divisors is an integer number (1785820317).

Almost surely, 2^11521421350 is an apocalyptic number.

11521421350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11521421350 is a deficient number, since it is larger than the sum of its proper divisors (9908422454).

11521421350 is a wasteful number, since it uses less digits than its factorization.

11521421350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230428439 (or 230428434 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 11521421350 its reverse (5312412511), we get a palindrome (16833833861).

The spelling of 11521421350 in words is "eleven billion, five hundred twenty-one million, four hundred twenty-one thousand, three hundred fifty".