102010221001 has 4 divisors (see below), whose sum is σ = 109857161092. Its totient is φ = 94163280912.

The previous prime is 102010220941. The next prime is 102010221007. The reversal of 102010221001 is 100122010201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100122010201 = 43451 ⋅2304251.

It can be written as a sum of positive squares in 2 ways, for example, as 13399220025 + 88611000976 = 115755^2 + 297676^2 .

It is a cyclic number.

It is not a de Polignac number, because 102010221001 - 2⁹ = 102010220489 is a prime.

It is a super-2 number, since 2×102010221001² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102010221007) 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, 3923470026 + ... + 3923470051.

It is an arithmetic number, because the mean of its divisors is an integer number (27464290273).

Almost surely, 2^102010221001 is an apocalyptic number.

It is an amenable number.

102010221001 is a deficient number, since it is larger than the sum of its proper divisors (7846940091).

102010221001 is an equidigital number, since it uses as much as digits as its factorization.

102010221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7846940090.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 102010221001 its reverse (100122010201), we get a palindrome (202132231202).

The spelling of 102010221001 in words is "one hundred two billion, ten million, two hundred twenty-one thousand, one".