121212210022 has 4 divisors (see below), whose sum is σ = 181818315036. Its totient is φ = 60606105010.

The previous prime is 121212210013. The next prime is 121212210023. The reversal of 121212210022 is 220012212121.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 121212209978 and 121212210005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212210023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30303052504 + ... + 30303052507.

It is an arithmetic number, because the mean of its divisors is an integer number (45454578759).

Almost surely, 2^121212210022 is an apocalyptic number.

121212210022 is a deficient number, since it is larger than the sum of its proper divisors (60606105014).

121212210022 is an equidigital number, since it uses as much as digits as its factorization.

121212210022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60606105013.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121212210022 its reverse (220012212121), we get a palindrome (341224422143).

The spelling of 121212210022 in words is "one hundred twenty-one billion, two hundred twelve million, two hundred ten thousand, twenty-two".