1121321100212 has 24 divisors (see below), whose sum is σ = 1969228989000. Its totient is φ = 558687481856.

The previous prime is 1121321100173. The next prime is 1121321100217. The reversal of 1121321100212 is 2120011231211.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1863994276 + 1119457105936 = 43174^2 + 1058044^2 .

It is a super-2 number, since 2×1121321100212² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121321100217) 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, 984464 + ... + 1792152.

It is an arithmetic number, because the mean of its divisors is an integer number (82051207875).

Almost surely, 2^{1121321100212} is an apocalyptic number.

It is an amenable number.

1121321100212 is a deficient number, since it is larger than the sum of its proper divisors (847907888788).

1121321100212 is a wasteful number, since it uses less digits than its factorization.

1121321100212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808915 (or 808913 counting only the distinct ones).

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

Adding to 1121321100212 its reverse (2120011231211), we get a palindrome (3241332331423).

The spelling of 1121321100212 in words is "one trillion, one hundred twenty-one billion, three hundred twenty-one million, one hundred thousand, two hundred twelve".