1321201012112 has 10 divisors (see below), whose sum is σ = 2559826960998. Its totient is φ = 660600506048.

The previous prime is 1321201012111. The next prime is 1321201012121. The reversal of 1321201012112 is 2112101021231.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1115778140416 + 205422871696 = 1056304^2 + 453236^2 .

It is a super-2 number, since 2×1321201012112² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1321201012111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41287531613 + ... + 41287531644.

Almost surely, 2^{1321201012112} is an apocalyptic number.

It is an amenable number.

1321201012112 is a deficient number, since it is larger than the sum of its proper divisors (1238625948886).

1321201012112 is an equidigital number, since it uses as much as digits as its factorization.

1321201012112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82575063265 (or 82575063259 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1321201012112 its reverse (2112101021231), we get a palindrome (3433302033343).

The spelling of 1321201012112 in words is "one trillion, three hundred twenty-one billion, two hundred one million, twelve thousand, one hundred twelve".