1212120100121 has 32 divisors (see below), whose sum is σ = 1474676582400. Its totient is φ = 974337753600.

The previous prime is 1212120100057. The next prime is 1212120100123. The reversal of 1212120100121 is 1210010212121.

It is a cyclic number.

It is not a de Polignac number, because 1212120100121 - 2⁶ = 1212120100057 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1212120100096 and 1212120100105.

It is not an unprimeable number, because it can be changed into a prime (1212120100123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 868475 + ... + 1782831.

It is an arithmetic number, because the mean of its divisors is an integer number (46083643200).

Almost surely, 2^{1212120100121} is an apocalyptic number.

It is an amenable number.

1212120100121 is a deficient number, since it is larger than the sum of its proper divisors (262556482279).

1212120100121 is a wasteful number, since it uses less digits than its factorization.

1212120100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914585.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1212120100121 its reverse (1210010212121), we get a palindrome (2422130312242).

The spelling of 1212120100121 in words is "one trillion, two hundred twelve billion, one hundred twenty million, one hundred thousand, one hundred twenty-one".