21011202020122 has 16 divisors (see below), whose sum is σ = 32887518834240. Its totient is φ = 10048707409312.

The previous prime is 21011202020101. The next prime is 21011202020129. The reversal of 21011202020122 is 22102020211012.

It is a happy number.

It is a super-2 number, since 2×21011202020122² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21011202020096 and 21011202020105.

It is not an unprimeable number, because it can be changed into a prime (21011202020129) 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, 774318 + ... + 6528550.

It is an arithmetic number, because the mean of its divisors is an integer number (2055469927140).

Almost surely, 2^{21011202020122} is an apocalyptic number.

21011202020122 is a deficient number, since it is larger than the sum of its proper divisors (11876316814118).

21011202020122 is a wasteful number, since it uses less digits than its factorization.

21011202020122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5833637.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21011202020122 its reverse (22102020211012), we get a palindrome (43113222231134).

The spelling of 21011202020122 in words is "twenty-one trillion, eleven billion, two hundred two million, twenty thousand, one hundred twenty-two".