1200210000121 has 16 divisors (see below), whose sum is σ = 1315209996288. Its totient is φ = 1086192566800.

The previous prime is 1200210000089. The next prime is 1200210000133. The reversal of 1200210000121 is 1210000120021.

It is not a de Polignac number, because 1200210000121 - 2⁵ = 1200210000089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200210000098 and 1200210000107.

It is not an unprimeable number, because it can be changed into a prime (1200210004121) 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, 45409716 + ... + 45436138.

It is an arithmetic number, because the mean of its divisors is an integer number (82200624768).

Almost surely, 2^{1200210000121} is an apocalyptic number.

1200210000121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200210000121 is a deficient number, since it is larger than the sum of its proper divisors (114999996167).

1200210000121 is a wasteful number, since it uses less digits than its factorization.

1200210000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44852.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1200210000121 its reverse (1210000120021), we get a palindrome (2410210120142).

The spelling of 1200210000121 in words is "one trillion, two hundred billion, two hundred ten million, one hundred twenty-one", and thus it is an aban number.