121012211020101 has 4 divisors (see below), whose sum is σ = 161349614693472. Its totient is φ = 80674807346732.

The previous prime is 121012211020067. The next prime is 121012211020139. The reversal of 121012211020101 is 101020112210121.

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.

It is a cyclic number.

It is not a de Polignac number, because 121012211020101 - 2¹¹ = 121012211018053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012211000101) 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, 20168701836681 + ... + 20168701836686.

It is an arithmetic number, because the mean of its divisors is an integer number (40337403673368).

Almost surely, 2^{121012211020101} is an apocalyptic number.

It is an amenable number.

121012211020101 is a deficient number, since it is larger than the sum of its proper divisors (40337403673371).

121012211020101 is an equidigital number, since it uses as much as digits as its factorization.

121012211020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40337403673370.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121012211020101 its reverse (101020112210121), we get a palindrome (222032323230222).

The spelling of 121012211020101 in words is "one hundred twenty-one trillion, twelve billion, two hundred eleven million, twenty thousand, one hundred one".