2121122402 has 16 divisors (see below), whose sum is σ = 3850104960. Its totient is φ = 855578688.

The previous prime is 2121122401. The next prime is 2121122407. The reversal of 2121122402 is 2042211212.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (2121122401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4455902 + ... + 4456377.

It is an arithmetic number, because the mean of its divisors is an integer number (240631560).

Almost surely, 2^2121122402 is an apocalyptic number.

2121122402 is a deficient number, since it is larger than the sum of its proper divisors (1728982558).

2121122402 is a wasteful number, since it uses less digits than its factorization.

2121122402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8912305.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 2121122402 is about 46055.6446269076. The cubic root of 2121122402 is about 1284.8583273284.

Adding to 2121122402 its reverse (2042211212), we get a palindrome (4163333614).

The spelling of 2121122402 in words is "two billion, one hundred twenty-one million, one hundred twenty-two thousand, four hundred two".