1012212122 has 4 divisors (see below), whose sum is σ = 1518318186. Its totient is φ = 506106060.

The previous prime is 1012212121. The next prime is 1012212151. The reversal of 1012212122 is 2212122101.

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., 522076801 + 490135321 = 22849^2 + 22139^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1012212097 and 1012212106.

It is not an unprimeable number, because it can be changed into a prime (1012212121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253053029 + ... + 253053032.

Almost surely, 2^1012212122 is an apocalyptic number.

1012212122 is a deficient number, since it is larger than the sum of its proper divisors (506106064).

1012212122 is an equidigital number, since it uses as much as digits as its factorization.

1012212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506106063.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1012212122 is about 31815.2812654548. The cubic root of 1012212122 is about 1004.0542481918.

Adding to 1012212122 its reverse (2212122101), we get a palindrome (3224334223).

It can be divided in two parts, 101 and 2212122, that multiplied together give a palindrome (223424322).

The spelling of 1012212122 in words is "one billion, twelve million, two hundred twelve thousand, one hundred twenty-two".