21122002010 has 8 divisors (see below), whose sum is σ = 38019603636. Its totient is φ = 8448800800.

The previous prime is 21122001991. The next prime is 21122002049. The reversal of 21122002010 is 1020022112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18610689241 + 2511312769 = 136421^2 + 50113^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21122002010² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122001982 and 21122002000.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056100091 + ... + 1056100110.

Almost surely, 2^21122002010 is an apocalyptic number.

21122002010 is a deficient number, since it is larger than the sum of its proper divisors (16897601626).

21122002010 is a wasteful number, since it uses less digits than its factorization.

21122002010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112200208.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21122002010 its reverse (1020022112), we get a palindrome (22142024122).

The spelling of 21122002010 in words is "twenty-one billion, one hundred twenty-two million, two thousand, ten".