20011000012021 has 8 divisors (see below), whose sum is σ = 20252181378240. Its totient is φ = 19769820669312.

The previous prime is 20011000011983. The next prime is 20011000012043. The reversal of 20011000012021 is 12021000011002.

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

It is a cyclic number.

It is not a de Polignac number, because 20011000012021 - 2¹³ = 20011000003829 is a prime.

It is a super-2 number, since 2×20011000012021² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20011000011989 and 20011000012007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011000012121) 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, 31582296 + ... + 32209678.

It is an arithmetic number, because the mean of its divisors is an integer number (2531522672280).

Almost surely, 2^{20011000012021} is an apocalyptic number.

It is an amenable number.

20011000012021 is a deficient number, since it is larger than the sum of its proper divisors (241181366219).

20011000012021 is an equidigital number, since it uses as much as digits as its factorization.

20011000012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011755.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20011000012021 its reverse (12021000011002), we get a palindrome (32032000023023).

The spelling of 20011000012021 in words is "twenty trillion, eleven billion, twelve thousand, twenty-one".