20212121102011 has 16 divisors (see below), whose sum is σ = 20512721911968. Its totient is φ = 19913598432000.

The previous prime is 20212121101993. The next prime is 20212121102111. The reversal of 20212121102011 is 11020112121202.

It is a cyclic number.

It is not a de Polignac number, because 20212121102011 - 2²¹ = 20212119004859 is a prime.

It is a super-2 number, since 2×20212121102011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20212121102111) 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, 37313296 + ... + 37851106.

It is an arithmetic number, because the mean of its divisors is an integer number (1282045119498).

Almost surely, 2^{20212121102011} is an apocalyptic number.

20212121102011 is a deficient number, since it is larger than the sum of its proper divisors (300600809957).

20212121102011 is a wasteful number, since it uses less digits than its factorization.

20212121102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539742.

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

Adding to 20212121102011 its reverse (11020112121202), we get a palindrome (31232233223213).

The spelling of 20212121102011 in words is "twenty trillion, two hundred twelve billion, one hundred twenty-one million, one hundred two thousand, eleven".