1211122010 has 16 divisors (see below), whose sum is σ = 2491451136. Its totient is φ = 415241808.

The previous prime is 1211121943. The next prime is 1211122019. The reversal of 1211122010 is 102211121.

It is a junction number, because it is equal to n+sod(n) for n = 1211121982 and 1211122000.

It is not an unprimeable number, because it can be changed into a prime (1211122019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8650802 + ... + 8650941.

It is an arithmetic number, because the mean of its divisors is an integer number (155715696).

Almost surely, 2^1211122010 is an apocalyptic number.

1211122010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211122010 is an abundant number, since it is smaller than the sum of its proper divisors (1280329126).

1211122010 is a wasteful number, since it uses less digits than its factorization.

1211122010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17301757.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1211122010 is about 34801.1782846501. The cubic root of 1211122010 is about 1065.9315059122.

Adding to 1211122010 its reverse (102211121), we get a palindrome (1313333131).

The spelling of 1211122010 in words is "one billion, two hundred eleven million, one hundred twenty-two thousand, ten".