1221200210122 has 32 divisors (see below), whose sum is σ = 1853126737920. Its totient is φ = 603531537840.

The previous prime is 1221200210077. The next prime is 1221200210183. The reversal of 1221200210122 is 2210120021221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1221200210096 and 1221200210105.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76763293 + ... + 76779199.

It is an arithmetic number, because the mean of its divisors is an integer number (57910210560).

Almost surely, 2^{1221200210122} is an apocalyptic number.

1221200210122 is a deficient number, since it is larger than the sum of its proper divisors (631926527798).

1221200210122 is a wasteful number, since it uses less digits than its factorization.

1221200210122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17146.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1221200210122 its reverse (2210120021221), we get a palindrome (3431320231343).

The spelling of 1221200210122 in words is "one trillion, two hundred twenty-one billion, two hundred million, two hundred ten thousand, one hundred twenty-two".