21022202211002 has 4 divisors (see below), whose sum is σ = 31533303316506. Its totient is φ = 10511101105500.

The previous prime is 21022202210959. The next prime is 21022202211089. The reversal of 21022202211002 is 20011220222012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14167854088441 + 6854348122561 = 3764021^2 + 2618081^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5255550552749 + ... + 5255550552752.

Almost surely, 2^{21022202211002} is an apocalyptic number.

21022202211002 is a deficient number, since it is larger than the sum of its proper divisors (10511101105504).

21022202211002 is a wasteful number, since it uses less digits than its factorization.

21022202211002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10511101105503.

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

Adding to 21022202211002 its reverse (20011220222012), we get a palindrome (41033422433014).

The spelling of 21022202211002 in words is "twenty-one trillion, twenty-two billion, two hundred two million, two hundred eleven thousand, two".