1521122245444 has 12 divisors (see below), whose sum is σ = 2661972997824. Its totient is φ = 760558531784.

The previous prime is 1521122245429. The next prime is 1521122245451. The reversal of 1521122245444 is 4445422211251.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1375209 + ... + 2221135.

It is an arithmetic number, because the mean of its divisors is an integer number (221831083152).

Almost surely, 2^{1521122245444} is an apocalyptic number.

It is an amenable number.

1521122245444 is a deficient number, since it is larger than the sum of its proper divisors (1140850752380).

1521122245444 is a wasteful number, since it uses less digits than its factorization.

1521122245444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295474 (or 1295472 counting only the distinct ones).

The product of its digits is 102400, while the sum is 37.

Adding to 1521122245444 its reverse (4445422211251), we get a palindrome (5966544456695).

The spelling of 1521122245444 in words is "one trillion, five hundred twenty-one billion, one hundred twenty-two million, two hundred forty-five thousand, four hundred forty-four".