102211221202021 has 4 divisors (see below), whose sum is σ = 102211250216832. Its totient is φ = 102211192187212.

The previous prime is 102211221201997. The next prime is 102211221202033. The reversal of 102211221202021 is 120202122112201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102211221202021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102211221202021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102211221202921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8353045 + ... + 16558858.

It is an arithmetic number, because the mean of its divisors is an integer number (25552812554208).

Almost surely, 2^{102211221202021} is an apocalyptic number.

It is an amenable number.

102211221202021 is a deficient number, since it is larger than the sum of its proper divisors (29014811).

102211221202021 is an equidigital number, since it uses as much as digits as its factorization.

102211221202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29014810.

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

Adding to 102211221202021 its reverse (120202122112201), we get a palindrome (222413343314222).

The spelling of 102211221202021 in words is "one hundred two trillion, two hundred eleven billion, two hundred twenty-one million, two hundred two thousand, twenty-one".