521401033211 has 12 divisors (see below), whose sum is σ = 541749367896. Its totient is φ = 501715543680.

The previous prime is 521401033169. The next prime is 521401033249. The reversal of 521401033211 is 112330104125.

It is not a de Polignac number, because 521401033211 - 2⁶ = 521401033147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521401033411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2001761 + ... + 2247186.

It is an arithmetic number, because the mean of its divisors is an integer number (45145780658).

Almost surely, 2^521401033211 is an apocalyptic number.

521401033211 is a deficient number, since it is larger than the sum of its proper divisors (20348334685).

521401033211 is an equidigital number, since it uses as much as digits as its factorization.

521401033211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4249102 (or 4249061 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 521401033211 its reverse (112330104125), we get a palindrome (633731137336).

The spelling of 521401033211 in words is "five hundred twenty-one billion, four hundred one million, thirty-three thousand, two hundred eleven".