20211201012121 has 16 divisors (see below), whose sum is σ = 23494373942400. Its totient is φ = 17027101663488.

The previous prime is 20211201012017. The next prime is 20211201012137. The reversal of 20211201012121 is 12121010211202.

It is not a de Polignac number, because 20211201012121 - 2²³ = 20211192623513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20211201012095 and 20211201012104.

It is not an unprimeable number, because it can be changed into a prime (20211201012151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2309826 + ... + 6764443.

It is an arithmetic number, because the mean of its divisors is an integer number (1468398371400).

Almost surely, 2^{20211201012121} is an apocalyptic number.

It is an amenable number.

20211201012121 is a deficient number, since it is larger than the sum of its proper divisors (3283172930279).

20211201012121 is an equidigital number, since it uses as much as digits as its factorization.

20211201012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9079728.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20211201012121 its reverse (12121010211202), we get a palindrome (32332211223323).

The spelling of 20211201012121 in words is "twenty trillion, two hundred eleven billion, two hundred one million, twelve thousand, one hundred twenty-one".