1031321221102 has 16 divisors (see below), whose sum is σ = 1555409965824. Its totient is φ = 512857899000.

The previous prime is 1031321221033. The next prime is 1031321221109. The reversal of 1031321221102 is 2011221231301.

It is a super-2 number, since 2×1031321221102² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1031321221102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031321221109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1356724 + ... + 1975687.

It is an arithmetic number, because the mean of its divisors is an integer number (97213122864).

Almost surely, 2^{1031321221102} is an apocalyptic number.

1031321221102 is a deficient number, since it is larger than the sum of its proper divisors (524088744722).

1031321221102 is a wasteful number, since it uses less digits than its factorization.

1031321221102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3333255.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1031321221102 its reverse (2011221231301), we get a palindrome (3042542452403).

The spelling of 1031321221102 in words is "one trillion, thirty-one billion, three hundred twenty-one million, two hundred twenty-one thousand, one hundred two".