20101201002121 has 4 divisors (see below), whose sum is σ = 20568670792912. Its totient is φ = 19633731211332.

The previous prime is 20101201002067. The next prime is 20101201002143. The reversal of 20101201002121 is 12120010210102.

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 20101201002121 - 2⁷ = 20101201001993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20101201000121) 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, 233734895331 + ... + 233734895416.

It is an arithmetic number, because the mean of its divisors is an integer number (5142167698228).

Almost surely, 2^{20101201002121} is an apocalyptic number.

It is an amenable number.

20101201002121 is a deficient number, since it is larger than the sum of its proper divisors (467469790791).

20101201002121 is an equidigital number, since it uses as much as digits as its factorization.

20101201002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467469790790.

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

Adding to 20101201002121 its reverse (12120010210102), we get a palindrome (32221211212223).

The spelling of 20101201002121 in words is "twenty trillion, one hundred one billion, two hundred one million, two thousand, one hundred twenty-one".