102120220010101 has 4 divisors (see below), whose sum is σ = 102120325605900. Its totient is φ = 102120114414304.

The previous prime is 102120220010057. The next prime is 102120220010147. The reversal of 102120220010101 is 101010022021201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18130308520900 + 83989911489201 = 4257970^2 + 9164601^2 .

It is a cyclic number.

It is not a de Polignac number, because 102120220010101 - 2¹⁵ = 102120219977333 is a prime.

It is a super-2 number, since 2×102120220010101² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102120220010161) 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, 51333736 + ... + 53285953.

It is an arithmetic number, because the mean of its divisors is an integer number (25530081401475).

Almost surely, 2^{102120220010101} is an apocalyptic number.

It is an amenable number.

102120220010101 is a deficient number, since it is larger than the sum of its proper divisors (105595799).

102120220010101 is an equidigital number, since it uses as much as digits as its factorization.

102120220010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105595798.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102120220010101 its reverse (101010022021201), we get a palindrome (203130242031302).

The spelling of 102120220010101 in words is "one hundred two trillion, one hundred twenty billion, two hundred twenty million, ten thousand, one hundred one".