1200001210122 has 32 divisors (see below), whose sum is σ = 2819583264960. Its totient is φ = 335664673920.

The previous prime is 1200001210103. The next prime is 1200001210123. The reversal of 1200001210122 is 2210121000021.

It is a junction number, because it is equal to n+sod(n) for n = 1200001210098 and 1200001210107.

It is not an unprimeable number, because it can be changed into a prime (1200001210123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 699300547 + ... + 699302262.

It is an arithmetic number, because the mean of its divisors is an integer number (88111977030).

Almost surely, 2^{1200001210122} is an apocalyptic number.

1200001210122 is an abundant number, since it is smaller than the sum of its proper divisors (1619582054838).

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

1200001210122 is a wasteful number, since it uses less digits than its factorization.

1200001210122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398602838.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1200001210122 its reverse (2210121000021), we get a palindrome (3410122210143).

The spelling of 1200001210122 in words is "one trillion, two hundred billion, one million, two hundred ten thousand, one hundred twenty-two".