20011020211021 has 16 divisors (see below), whose sum is σ = 23404017417088. Its totient is φ = 16751675707200.

The previous prime is 20011020210989. The next prime is 20011020211027. The reversal of 20011020211021 is 12011202011002.

It is not a de Polignac number, because 20011020211021 - 2⁵ = 20011020210989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20011020210992 and 20011020211010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011020211027) 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, 532770 + ... + 6348691.

It is an arithmetic number, because the mean of its divisors is an integer number (1462751088568).

Almost surely, 2^{20011020211021} is an apocalyptic number.

It is an amenable number.

20011020211021 is a deficient number, since it is larger than the sum of its proper divisors (3392997206067).

20011020211021 is an equidigital number, since it uses as much as digits as its factorization.

20011020211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6891172.

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

Adding to 20011020211021 its reverse (12011202011002), we get a palindrome (32022222222023).

The spelling of 20011020211021 in words is "twenty trillion, eleven billion, twenty million, two hundred eleven thousand, twenty-one".