102040120101 has 4 divisors (see below), whose sum is σ = 136053493472. Its totient is φ = 68026746732.

The previous prime is 102040120073. The next prime is 102040120109. The reversal of 102040120101 is 101021040201.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 101021040201 = 3 ⋅33673680067.

It is not a de Polignac number, because 102040120101 - 2⁵ = 102040120069 is a prime.

It is a super-2 number, since 2×102040120101² (a number of 23 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 (102040120109) 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, 17006686681 + ... + 17006686686.

It is an arithmetic number, because the mean of its divisors is an integer number (34013373368).

Almost surely, 2^102040120101 is an apocalyptic number.

It is an amenable number.

102040120101 is a deficient number, since it is larger than the sum of its proper divisors (34013373371).

102040120101 is an equidigital number, since it uses as much as digits as its factorization.

102040120101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34013373370.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 102040120101 its reverse (101021040201), we get a palindrome (203061160302).

The spelling of 102040120101 in words is "one hundred two billion, forty million, one hundred twenty thousand, one hundred one".