121231231222200 has 192 divisors, whose sum is σ = 411741566496000. Its totient is φ = 29263254297600.

The previous prime is 121231231222111. The next prime is 121231231222229. The reversal of 121231231222200 is 2222132132121.

It is a super-2 number, since 2×121231231222200² (a number of 29 digits) contains 22 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 an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37879300 + ... + 40954899.

It is an arithmetic number, because the mean of its divisors is an integer number (2144487325500).

Almost surely, 2^{121231231222200} is an apocalyptic number.

121231231222200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121231231222200 is an abundant number, since it is smaller than the sum of its proper divisors (290510335273800).

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

121231231222200 is a wasteful number, since it uses less digits than its factorization.

121231231222200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78834462 (or 78834453 counting only the distinct ones).

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

Adding to 121231231222200 its reverse (2222132132121), we get a palindrome (123453363354321).

The spelling of 121231231222200 in words is "one hundred twenty-one trillion, two hundred thirty-one billion, two hundred thirty-one million, two hundred twenty-two thousand, two hundred".