1211020122 has 16 divisors (see below), whose sum is σ = 2608351200. Its totient is φ = 372621552.

The previous prime is 1211020121. The next prime is 1211020123. The reversal of 1211020122 is 2210201121.

It is an interprime number because it is at equal distance from previous prime (1211020121) and next prime (1211020123).

It is a junction number, because it is equal to n+sod(n) for n = 1211020098 and 1211020107.

It is not an unprimeable number, because it can be changed into a prime (1211020121) 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, 7762872 + ... + 7763027.

It is an arithmetic number, because the mean of its divisors is an integer number (163021950).

Almost surely, 2^1211020122 is an apocalyptic number.

1211020122 is an abundant number, since it is smaller than the sum of its proper divisors (1397331078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211020122 is a wasteful number, since it uses less digits than its factorization.

1211020122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15525917.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1211020122 is about 34799.7143953797. The cubic root of 1211020122 is about 1065.9016138853.

Adding to 1211020122 its reverse (2210201121), we get a palindrome (3421221243).

The spelling of 1211020122 in words is "one billion, two hundred eleven million, twenty thousand, one hundred twenty-two".