20210111021211 has 16 divisors (see below), whose sum is σ = 27409177725216. Its totient is φ = 13243485678336.

The previous prime is 20210111021201. The next prime is 20210111021237. The reversal of 20210111021211 is 11212011101202.

It is a happy number.

It is not a de Polignac number, because 20210111021211 - 2⁶ = 20210111021147 is a prime.

It is a super-3 number, since 3×20210111021211³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20210111021201) 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, 157416400 + ... + 157544733.

It is an arithmetic number, because the mean of its divisors is an integer number (1713073607826).

Almost surely, 2^{20210111021211} is an apocalyptic number.

20210111021211 is a deficient number, since it is larger than the sum of its proper divisors (7199066704005).

20210111021211 is a wasteful number, since it uses less digits than its factorization.

20210111021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314961502.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20210111021211 its reverse (11212011101202), we get a palindrome (31422122122413).

The spelling of 20210111021211 in words is "twenty trillion, two hundred ten billion, one hundred eleven million, twenty-one thousand, two hundred eleven".