20210121012001 has 8 divisors (see below), whose sum is σ = 21275022539520. Its totient is φ = 19145340579312.

The previous prime is 20210121011989. The next prime is 20210121012091. The reversal of 20210121012001 is 10021012101202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20210121012001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20210121012091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29931025 + ... + 30598798.

It is an arithmetic number, because the mean of its divisors is an integer number (2659377817440).

Almost surely, 2^{20210121012001} is an apocalyptic number.

It is an amenable number.

20210121012001 is a deficient number, since it is larger than the sum of its proper divisors (1064901527519).

20210121012001 is a wasteful number, since it uses less digits than its factorization.

20210121012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60547415.

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

Adding to 20210121012001 its reverse (10021012101202), we get a palindrome (30231133113203).

The spelling of 20210121012001 in words is "twenty trillion, two hundred ten billion, one hundred twenty-one million, twelve thousand, one".