221012211012202 has 4 divisors (see below), whose sum is σ = 331518316518306. Its totient is φ = 110506105506100.

The previous prime is 221012211012167. The next prime is 221012211012223. The reversal of 221012211012202 is 202210112210122.

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., 206251562054521 + 14760648957681 = 14361461^2 + 3841959^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221012211012202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55253052753049 + ... + 55253052753052.

Almost surely, 2^{221012211012202} is an apocalyptic number.

221012211012202 is a deficient number, since it is larger than the sum of its proper divisors (110506105506104).

221012211012202 is a wasteful number, since it uses less digits than its factorization.

221012211012202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110506105506103.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221012211012202 its reverse (202210112210122), we get a palindrome (423222323222324).

The spelling of 221012211012202 in words is "two hundred twenty-one trillion, twelve billion, two hundred eleven million, twelve thousand, two hundred two".