1321203212122 has 32 divisors (see below), whose sum is σ = 2004950844864. Its totient is φ = 652910544000.

The previous prime is 1321203212117. The next prime is 1321203212123. The reversal of 1321203212122 is 2212123021231.

It is a junction number, because it is equal to n+sod(n) for n = 1321203212093 and 1321203212102.

It is not an unprimeable number, because it can be changed into a prime (1321203212123) 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, 384852118 + ... + 384855550.

It is an arithmetic number, because the mean of its divisors is an integer number (62654713902).

Almost surely, 2^{1321203212122} is an apocalyptic number.

1321203212122 is a deficient number, since it is larger than the sum of its proper divisors (683747632742).

1321203212122 is a wasteful number, since it uses less digits than its factorization.

1321203212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6334.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1321203212122 its reverse (2212123021231), we get a palindrome (3533326233353).

The spelling of 1321203212122 in words is "one trillion, three hundred twenty-one billion, two hundred three million, two hundred twelve thousand, one hundred twenty-two".