1223222151400 has 288 divisors, whose sum is σ = 3159787135680. Its totient is φ = 439464960000.

The previous prime is 1223222151353. The next prime is 1223222151407. The reversal of 1223222151400 is 41512223221.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (1223222151407) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 798968635 + ... + 798970165.

It is an arithmetic number, because the mean of its divisors is an integer number (10971483110).

Almost surely, 2^{1223222151400} is an apocalyptic number.

1223222151400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223222151400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1579893567840).

1223222151400 is an abundant number, since it is smaller than the sum of its proper divisors (1936564984280).

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

1223222151400 is a wasteful number, since it uses less digits than its factorization.

1223222151400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2205 (or 2179 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 1223222151400 its reverse (41512223221), we get a palindrome (1264734374621).

It can be divided in two parts, 122322 and 2151400, that added together give a palindrome (2273722).

The spelling of 1223222151400 in words is "one trillion, two hundred twenty-three billion, two hundred twenty-two million, one hundred fifty-one thousand, four hundred".