1211402223312 has 20 divisors (see below), whose sum is σ = 3129455743680. Its totient is φ = 403800741088.

The previous prime is 1211402223299. The next prime is 1211402223313. The reversal of 1211402223312 is 2133222041121.

It is a super-3 number, since 3×1211402223312³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211402223313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12618773112 + ... + 12618773207.

It is an arithmetic number, because the mean of its divisors is an integer number (156472787184).

Almost surely, 2^{1211402223312} is an apocalyptic number.

1211402223312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211402223312 is an abundant number, since it is smaller than the sum of its proper divisors (1918053520368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211402223312 is a wasteful number, since it uses less digits than its factorization.

1211402223312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25237546330 (or 25237546324 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 1211402223312 its reverse (2133222041121), we get a palindrome (3344624264433).

The spelling of 1211402223312 in words is "one trillion, two hundred eleven billion, four hundred two million, two hundred twenty-three thousand, three hundred twelve".