121022400 has 168 divisors, whose sum is σ = 418266880. Its totient is φ = 30551040.

The previous prime is 121022399. The next prime is 121022401. The reversal of 121022400 is 4220121.

121022400 is nontrivially palindromic in base 7.

It is an interprime number because it is at equal distance from previous prime (121022399) and next prime (121022401).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121022401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90537 + ... + 91863.

Almost surely, 2^121022400 is an apocalyptic number.

121022400 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 121022400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209133440).

121022400 is an abundant number, since it is smaller than the sum of its proper divisors (297244480).

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

121022400 is a wasteful number, since it uses less digits than its factorization.

121022400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371 (or 1356 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 121022400 is about 11001.0181347001. The cubic root of 121022400 is about 494.6392637526.

Adding to 121022400 its reverse (4220121), we get a palindrome (125242521).

The spelling of 121022400 in words is "one hundred twenty-one million, twenty-two thousand, four hundred".