211421104402 has 4 divisors (see below), whose sum is σ = 317131656606. Its totient is φ = 105710552200.

The previous prime is 211421104339. The next prime is 211421104429. The reversal of 211421104402 is 204401124112.

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., 181475148001 + 29945956401 = 425999^2 + 173049^2 .

It is a super-2 number, since 2×211421104402² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52855276099 + ... + 52855276102.

Almost surely, 2^211421104402 is an apocalyptic number.

211421104402 is a deficient number, since it is larger than the sum of its proper divisors (105710552204).

211421104402 is a wasteful number, since it uses less digits than its factorization.

211421104402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105710552203.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 211421104402 its reverse (204401124112), we get a palindrome (415822228514).

The spelling of 211421104402 in words is "two hundred eleven billion, four hundred twenty-one million, one hundred four thousand, four hundred two".