1211214422129 has 4 divisors (see below), whose sum is σ = 1215524794020. Its totient is φ = 1206904050240.

The previous prime is 1211214422107. The next prime is 1211214422149. The reversal of 1211214422129 is 9212244121121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1015757591104 + 195456831025 = 1007848^2 + 442105^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211214422129 - 2³⁶ = 1142494945393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211214422095 and 1211214422104.

It is not an unprimeable number, because it can be changed into a prime (1211214422149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2155185524 + ... + 2155186085.

It is an arithmetic number, because the mean of its divisors is an integer number (303881198505).

Almost surely, 2^{1211214422129} is an apocalyptic number.

It is an amenable number.

1211214422129 is a deficient number, since it is larger than the sum of its proper divisors (4310371891).

1211214422129 is an equidigital number, since it uses as much as digits as its factorization.

1211214422129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4310371890.

The product of its digits is 4608, while the sum is 32.

The spelling of 1211214422129 in words is "one trillion, two hundred eleven billion, two hundred fourteen million, four hundred twenty-two thousand, one hundred twenty-nine".