102121211110201 has 4 divisors (see below), whose sum is σ = 103132312210404. Its totient is φ = 101110110010000.

The previous prime is 102121211110187. The next prime is 102121211110211. The reversal of 102121211110201 is 102011112121201.

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 89214069902400 + 12907141207801 = 9445320^2 + 3592651^2 .

It is a cyclic number.

It is not a de Polignac number, because 102121211110201 - 2⁷ = 102121211110073 is a prime.

It is a super-2 number, since 2×102121211110201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102121211110211) 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, 505550549950 + ... + 505550550151.

It is an arithmetic number, because the mean of its divisors is an integer number (25783078052601).

Almost surely, 2^{102121211110201} is an apocalyptic number.

It is an amenable number.

102121211110201 is a deficient number, since it is larger than the sum of its proper divisors (1011101100203).

102121211110201 is a wasteful number, since it uses less digits than its factorization.

102121211110201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011101100202.

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

Adding to 102121211110201 its reverse (102011112121201), we get a palindrome (204132323231402).

The spelling of 102121211110201 in words is "one hundred two trillion, one hundred twenty-one billion, two hundred eleven million, one hundred ten thousand, two hundred one".