221211100020002 has 4 divisors (see below), whose sum is σ = 331816650030006. Its totient is φ = 110605550010000.

The previous prime is 221211100019977. The next prime is 221211100020023. The reversal of 221211100020002 is 200020001112122.

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., 215385533688361 + 5825566331641 = 14676019^2 + 2413621^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55302775004999 + ... + 55302775005002.

Almost surely, 2^{221211100020002} is an apocalyptic number.

221211100020002 is a deficient number, since it is larger than the sum of its proper divisors (110605550010004).

221211100020002 is a wasteful number, since it uses less digits than its factorization.

221211100020002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110605550010003.

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

Adding to 221211100020002 its reverse (200020001112122), we get a palindrome (421231101132124).

The spelling of 221211100020002 in words is "two hundred twenty-one trillion, two hundred eleven billion, one hundred million, twenty thousand, two".