20121202220022 has 24 divisors (see below), whose sum is σ = 43596020628576. Its totient is φ = 6707054716656.

The previous prime is 20121202220011. The next prime is 20121202220101. The reversal of 20121202220022 is 22002220212102.

20121202220022 is a `hidden beast` number, since 201 + 21 + 202 + 220 + 0 + 22 = 666.

It is a super-2 number, since 2×20121202220022² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20121202219977 and 20121202220004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18106963 + ... + 19186049.

It is an arithmetic number, because the mean of its divisors is an integer number (1816500859524).

Almost surely, 2^{20121202220022} is an apocalyptic number.

20121202220022 is an abundant number, since it is smaller than the sum of its proper divisors (23474818408554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20121202220022 is a wasteful number, since it uses less digits than its factorization.

20121202220022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2115012 (or 2115009 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20121202220022 its reverse (22002220212102), we get a palindrome (42123422432124).

The spelling of 20121202220022 in words is "twenty trillion, one hundred twenty-one billion, two hundred two million, two hundred twenty thousand, twenty-two".