1211012212 has 12 divisors (see below), whose sum is σ = 2126815236. Its totient is φ = 603350720.

The previous prime is 1211012207. The next prime is 1211012213. The reversal of 1211012212 is 2122101121.

It can be written as a sum of positive squares in 2 ways, for example, as 435723876 + 775288336 = 20874^2 + 27844^2 .

It is a super-2 number, since 2×1211012212² = 2933101155226265888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211012192 and 1211012201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211012213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537583 + ... + 539830.

It is an arithmetic number, because the mean of its divisors is an integer number (177234603).

Almost surely, 2^1211012212 is an apocalyptic number.

It is an amenable number.

1211012212 is a deficient number, since it is larger than the sum of its proper divisors (915803024).

1211012212 is a wasteful number, since it uses less digits than its factorization.

1211012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077698 (or 1077696 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1211012212 is about 34799.6007448361. The cubic root of 1211012212 is about 1065.8992931697.

Adding to 1211012212 its reverse (2122101121), we get a palindrome (3333113333).

The spelling of 1211012212 in words is "one billion, two hundred eleven million, twelve thousand, two hundred twelve".