21122121002 has 32 divisors (see below), whose sum is σ = 35116913664. Its totient is φ = 9483667200.

The previous prime is 21122120993. The next prime is 21122121017. The reversal of 21122121002 is 20012122112.

It is a super-2 number, since 2×21122121002² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66293 + ... + 215960.

It is an arithmetic number, because the mean of its divisors is an integer number (1097403552).

Almost surely, 2^21122121002 is an apocalyptic number.

21122121002 is a deficient number, since it is larger than the sum of its proper divisors (13994792662).

21122121002 is a wasteful number, since it uses less digits than its factorization.

21122121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282374.

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

Adding to 21122121002 its reverse (20012122112), we get a palindrome (41134243114).

The spelling of 21122121002 in words is "twenty-one billion, one hundred twenty-two million, one hundred twenty-one thousand, two".