1212210012122 has 4 divisors (see below), whose sum is σ = 1818315018186. Its totient is φ = 606105006060.

The previous prime is 1212210012119. The next prime is 1212210012127. The reversal of 1212210012122 is 2212100122121.

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

It can be written as a sum of positive squares in only one way, i.e., 1140493707721 + 71716304401 = 1067939^2 + 267799^2 .

It is a super-2 number, since 2×1212210012122² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1212210012122.

It is not an unprimeable number, because it can be changed into a prime (1212210012127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303052503029 + ... + 303052503032.

Almost surely, 2^{1212210012122} is an apocalyptic number.

1212210012122 is a deficient number, since it is larger than the sum of its proper divisors (606105006064).

1212210012122 is an equidigital number, since it uses as much as digits as its factorization.

1212210012122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606105006063.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1212210012122 its reverse (2212100122121), we get a palindrome (3424310134243).

The spelling of 1212210012122 in words is "one trillion, two hundred twelve billion, two hundred ten million, twelve thousand, one hundred twenty-two".