1212212020231 has 4 divisors (see below), whose sum is σ = 1212266836552. Its totient is φ = 1212157203912.

The previous prime is 1212212020183. The next prime is 1212212020277. The reversal of 1212212020231 is 1320202122121.

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

It is a cyclic number.

It is not a de Polignac number, because 1212212020231 - 2²¹ = 1212209923079 is a prime.

It is a super-2 number, since 2×1212212020231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212212020199 and 1212212020208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212212020291) 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, 27374976 + ... + 27419221.

It is an arithmetic number, because the mean of its divisors is an integer number (303066709138).

Almost surely, 2^{1212212020231} is an apocalyptic number.

1212212020231 is a deficient number, since it is larger than the sum of its proper divisors (54816321).

1212212020231 is an equidigital number, since it uses as much as digits as its factorization.

1212212020231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54816320.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1212212020231 its reverse (1320202122121), we get a palindrome (2532414142352).

The spelling of 1212212020231 in words is "one trillion, two hundred twelve billion, two hundred twelve million, twenty thousand, two hundred thirty-one".